Which word means the 'smallest particle of a substance'? [8e-1]
atom
molecule
symbol
formula
Which word means 'a larger particle formed by bonding together the smallest particles of substances'? [8e-2]
atom
molecule
symbol
formula
Which word means the 'shorthand for a chemical element'? [8e-3]
atom
molecule
symbol
formula
Which word means 'a summary of the number of atoms of each element in a compound'? [8e-4]
atom
molecule
symbol
formula
Which of these is an element? [8e-5]
Cu
CO
MgO
H2O
Which of these is an element? [8e-6]
CoO
Mg
CO2
NaCl
Which of these is an element? [8e-7]
CoO
MgS
O2
NaCl
Which of these is an element? [8e-8]
KCl
MgS
F2O
P4
Which of these is a compound? [8e-9]
CO2
Co
F2
P4
Which of these is a compound? [8e-10]
Co
MgO
F2
P4
Which of these is a compound? [8e-11]
Fe
Co
CO
H2
Which of these is a compound? [8e-12]
Fe
Co
Ca
H2O
Which of these is an element? [8e-13]
nitrogen
carbon monoxide
water
petrol
Which of these is an element? [8e-14]
nitrogen monoxide
magnesium
water
alcohol
Which of these is an element? [8e-15]
water
magnesium oxide
bromine
alcohol
Which of these is an element? [8e-16]
water
magnesium oxide
brass
copper
Which of these is a compound? [8e-17]
carbon monoxide
magnesium
brass
bromine
Which of these is a compound? [8e-18]
carbon
water
copper
bromine
Which of these is a compound? [8e-19]
carbon
phosphorus
copper oxide
bromine
Which of these is a compound? [8e-20]
brass (alloy)
phosphorus (red)
copper (roofing)
ethanol (alcohol)
Which of these words means 'one type of atom only'? [8e-21]
element
compound
reactant
product
Which word means 'two or more types of atom combined together'? [8e-22]
element
compound
reactant
product
Which word means 'what you start with in a chemical reaction'? [8e-23]
element
compound
reactant
product
Which word means 'the result of a chemical reaction'? [8e-24]
element
compound
reactant
product
Which is the chemical symbol for carbon? [8e-25]
C
Ca
Cr
Co
Which is the chemical symbol for calcium? [8e-26]
C
Ca
Cu
Co
Which is the chemical symbol for copper? [8e-27]
CO
Ca
Cu
Co
Which is the chemical symbol for cobalt? [8e-28]
CO
Ca
Cu
Co
Which picture represents a mixture of two compound molecules? [8e-29]
Which picture represents molecules of a pure element? [8e-30]
Which picture represents a mixture of molecules of two elements? [8e-31]
Which picture represents a molecule mixture of two elements and one compound? [8e-32]
Which picture represents a mixture of atoms of an element and molecules of a compound? [8e-33]
Which picture represents atoms of a pure element? [8e-34]
Which picture represents a mixture of atoms of an element and molecules of another element? [8e-35]
Which picture represents molecules of a pure compound? [8e-36]
Which picture represents a mixture of atoms of two elements? [8e-37]
Which picture represents a mixture of molecules of an element and molecules of a compound? [8e-38]
Which picture best represents pure water? [8e-39]
Which picture best represents oxygen dissolved in pure water? [8e-40]
Which is likely to consist of one element? [8e-41]
gold ring
duralumin hi fi chassis
bronze statue
pure quartz crystal
Which is likely to consist of one element? [8e-42]
duralumin hi fi chassis
aluminium pan
bronze statue
pure quartz crystal
Which is likely to consist of one element? [8e-43]
duralumin hi fi chassis
bronze statue
yellow rock
sulfur
pure quartz crystal
Which is likely to consist of one element? [8e-44]
brass rivet
bronze statue
pure quartz crystal
silver plate
Which statement is TRUE ? [8e-45]
most elements are metals
most metals are magnetic
there are about 1000 different elements in the Periodic Table
there are no liquid elements at room temperature and pressure
Which statement is TRUE ? [8e-46]
most elements are non-metals
most metals are non-magnetic
there are about 1000 different elements in the Periodic Table
there are no liquid elements at room temperature and pressure
Which statement is TRUE ? [8e-47]
most elements are non-metals
most metals are magnetic
there are about 100 different elements in the Periodic Table
there are no liquid elements at room temperature and pressure
Which statement is TRUE ? [8e-48]
most elements are non-metals
most metals are magnetic
there are about 1000 different elements in the Periodic Table
there are a few liquid elements at room temperature and pressure
Which element is a liquid metal at room temperature and pressure? [8e-49]
mercury
bromine
phosphorus
nickel
Which element is a liquid non-metal at room temperature and pressure? [8e-50]
mercury
bromine
oxygen
nickel
Which element of the Periodic Table is a colourless non-metal gas? [8e-51]
mercury
bromine
nitrogen
nickel
Which element of the Periodic Table is a solid magnetic metal? [8e-52]
mercury
bromine
sulfur
nickel
The product of burning magnesium in air is? [8e-53]
magnesium oxide
oxygen magneside
magnesium hydroxide
milk of magnesia
The product of heating an iron-sulfur mixture is called? [8e-54]
iron
sulfate
iron
sulfide
sulfuric iron
sulfide of iron
The product of heating sodium in chlorine is called? [8e-55]
sodium chlorate
chloro sodium
sodium chloride
chloric sodiumate
The product of burning hydrogen in air is? [8e-56]
oxohydrogen
hydrogen peroxide
hydrogen hydroxide
water
What is formed when carbon burns in excess air? [8e-57]
carbon dioxide
carbon oxide
carbon monoxide
oxygen carbonate
What is formed when silvery zinc is heated in green chlorine gas? [8e-58]
zinc chlorate
zinc chloride
chlorozincate
chloride of zinc
What is formed after heating a
sulfur-copper mixture? [8e-59]
copper
sulfate
sulfonium cuprate
copper
sulfide
sulfate of copper
When copper is heated in a bunsen flame it forms a black solid. What is the name of the compound formed? [8e-60]
copper nitride
copper hydroxide
copper carbide
copper oxide
The formula for
sulfuric acid is H2SO4. What is the ratio of H : S : O atoms in the molecule? [8e-61]
2 : 1 : 4
1 : 2 : 4
2 : 4 : 4
2 : 2 : 4
The formula for calcium carbonate is CaCO3. What is the ratio of Ca : C : O atoms in the formula? [8e-62]
1 : 3 : 3
1 : 1 : 3
3 : 3 : 1
3 : 1 : 1
The formula for sodium
sulfate is Na2S2O3. What is the ratio of Na : S : O atoms in the formula? [8e-63]
3 : 2 : 2
3 : 3 : 2
2 : 2 : 3
2 : 3 : 3
The formula for copper
sulfate is CuSO4. What is the ratio of Cu : S : O atoms in the formula? [8e-64]
1 : 4 : 4
4 : 4 : 4
4 : 3 : 4
1 : 1 : 4
Which of the following reactions involves the chemical change ... two elements ==> compound? [8e-65]
zinc +
sulfur ==> zinc sulfide
oxygen + copper
sulfide ==> copper sulfate
carbon dioxide + calcium hydroxide ==> calcium carbonate + water
water ==> hydrogen + oxygen
Which of the following reactions involves the chemical change ... element + compound ==> compound? [8e-66]
zinc +
sulfur ==> zinc sulfide
oxygen + copper
sulfide ==> copper sulfate
carbon dioxide + calcium hydroxide ==> calcium carbonate + water
water ==> hydrogen + oxygen
Which of the following reactions involves the chemical change ... two compounds ==> two compounds? [8e-67]
zinc +
sulfur ==> zinc sulfide
oxygen + copper
sulfide ==> copper sulfate
carbon dioxide + calcium hydroxide ==> calcium carbonate + water
water ==> hydrogen + oxygen
Which of the following reactions involves the chemical change ... compound ==> two elements? [8e-68]
zinc +
sulfur ==> zinc sulfide
oxygen + copper
sulfide ==> copper sulfate
carbon dioxide + calcium hydroxide ==> calcium carbonate + water
water ==> hydrogen + oxygen
Which of the following is the chemical symbol for the element potassium? [8e-69]
K
Pt
Po
P
Which of the following is the chemical symbol for the element nitrogen? [8e-70]
No
N
Ne
Ni
Which of the following is the chemical symbol for the element magnesium? [8e-71]
Mn
Mo
Mg
Md
Which of the following is the chemical symbol for the element aluminium? [8e-72]
Am
Ar
As
Al
Which element is a solid magnetic metal at room temperature? [8e-73]
iron
sulfur
mercury
oxygen
Which element is a yellow solid non-metal room temperature? [8e-74]
iron
sulfur
mercury
oxygen
Which element is the only liquid metal at room temperature? [8e-75]
iron
sulfur
mercury
oxygen
Which element is a colourless gaseous non-metal at room temperature? [8e-76]
iron
sulfur
mercury
oxygen
Which element is a green non-metal gas? [8e-77]
chlorine
aluminium
bromine
sodium
Which element is a silvery grey solid metal? [8e-78]
chlorine
aluminium
bromine
sodium
Which element is a dark red liquid non-metal at room temperature? [8e-79]
chlorine
aluminium
bromine
sodium
Which element is a very soft silvery solid metal at room temperature? [8e-80]
chlorine
aluminium
bromine
sodium
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-81]
metals are good conductors of heat
metals have low melting and boiling points
non-metals are good conductors of electricity
non-metals have high densities
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-82]
metals are poor conductors of heat
metals have high melting and boiling points
non-metals are good conductors of electricity
non-metals have high densities
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-83]
metals are poor conductors of heat
metals have low melting and boiling points
non-metals are poor conductors of electricity
non-metals have high densities
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-84]
metals are poor conductors of heat
metals have low melting and boiling points
non-metals are good conductors of electricity
non-metals have low densities
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-85]
metals are good conductors of electricity
metals have low densities
non-metals are good conductors of heat
non-metals have high melting and boiling points
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-86]
metals are poor conductors of electricity
metals have high densities
non-metals are good conductors of heat
non-metals have high melting and boiling points
Which statement is USUALLY TRUE about metallic and non-metallic elements? [8e-87]
metals are poor conductors of electricity
metals have low densities
non-metals are poor conductors of heat
non-metals have high melting and boiling points
Which statement is USUALLY TRUE about metallic and non-metallic elements? [8e-88]
metals are poor conductors of electricity
metals have low densities
non-metals are good conductors of heat
non-metals have low melting and boiling points
Which is the chemical symbol for the element iron? [8e-89]
Fe
F
Ir
I
Which is the chemical symbol for the element zinc? [8e-90]
ZnO
Zn
ZnS
ZrC
Which is the chemical symbol for the element chlorine? [8e-91]
Co
Cr
Cl
Ce
Which is the chemical symbol for the element sodium? [8e-92]
S
Sm
Sn
Na
Which statement is TRUE about the Periodic Table of Elements? [8e-93]
metals are mostly on the left and in the middle
all non-metals are in the middle
there are about 1000 different elements
about 1/2 of the elements are metals
Which statement is TRUE about the Periodic Table of Elements? [8e-94]
metals are mostly in the middle and on the right
all non-metals are on the right
there are about 500 different elements
about 1/4 of the elements are metals
Which statement is TRUE about the Periodic Table of Elements? [8e-95]
metals are mostly in the middle and on the right
all non-metals are on the left
about 1/4 are non-metals
about 1/2 of the elements are metals
Which statement is TRUE about the Periodic Table of Elements? [8e-96]
metals are mostly in the middle and on the right
all non-metals are in the middle
there are about 50 different non-metals
about 3/4 of the elements are metals
Which statement is TRUE about the elements of the Periodic Table of Elements at room temperature? [8e-97]
almost all metals are silvery shiny solids
most non-metallic elements are dull solids
most metals like aluminium and copper are magnetic
it is impossible for a non-metal to be magnetic
Which statement is TRUE about the elements of the Periodic Table of Elements at room temperature? [8e-98]
only a few metals like aluminium and silver are silvery shiny solids
there are only a few non-metallic elements which are dull solids
most metals like aluminium and copper are magnetic
it is impossible for a non-metal to be magnetic
Which statement is TRUE about the elements of the Periodic Table of Elements at room temperature? [8e-99]
only a few metals like aluminium and silver are silvery shiny solids
most non-metallic elements are dull solids
a few metals like iron and nickel are magnetic
it is impossible for a non-metal to be magnetic
Which statement is TRUE about the elements of the Periodic Table of Elements at room temperature? [8e-100]
only a few metals like aluminium and silver are silvery shiny solids
most non-metallic elements are dull solids
most metals like aluminium and copper are magnetic
it is possible for a non-metal to be magnetic
Which of the following statements best describes the arrangement of particles in a gas? [sm-1]
Close together and stationary
Close together and vibrating
Far apart and moving slowly
Very far apart and moving quickly
Which of the following statements best describes the arrangement of particles in a solid? [sm-2]
Close together and stationary
Close together and vibrating
Far apart and moving slowly
Very far apart and moving quickly
Which of the following statements best describes the arrangement of particles in a liquid? [sm-3]
Close together and stationary
Far apart and vibrating
Close together and moving freely
Very far apart and moving quickly
Which of the following best describes what happens to the particles of water when it freezes? [sm-4]
They gain energy and break up into atoms of hydrogen and oxygen,
They gain energy and gain freedom to move about
They lose energy and escape into the atmosphere
They lose energy and lose freedom to move about,
Which of the following best describes what happens to the particles of ice when it melts? [sm-5]
They gain energy and break up into atoms of hydrogen and oxygen,
They gain energy and gain freedom to move about
They lose energy and escape into the atmosphere
They lose energy and lose freedom to move about,
Which of the following best describes what happens to the particles of water when it boils? [sm-6]
They gain kinetic energy and increase their freedom to move without significant attraction
They gain energy and gain freedom to move about
They lose energy and escape into the atmosphere
They lose energy and lose freedom to move about,
Which of the following best describes what happens to the particles of water vapour when it condenses? [sm-7]
They gain kinetic energy and increase their freedom to move without significant attraction
They gain energy and gain freedom to move about
They lose energy and are closer and less free to move around
They lose energy and lose freedom to move about,
Which of the following best describes what happens to the particles of water when it evaporates? [sm-8]
The higher kinetic energy particles increase their freedom to move without significant attraction
They gain energy and gain freedom to move about
They lose energy and escape into the atmosphere
They lose energy and lose freedom to move about,
The table shows the melting points and boiling points of some substances. Which substance is a solid at 25oC? [sm-9]
[Substance] Melting Point oC and Boiling Point oC
-39 and 354
119 and 446
15 and 126
-127 and -33
The table shows the melting points and boiling points of some substances. Which substance is a liquid at 0oC? [sm-10]
[Substance] Melting Point oC and Boiling Point oC
-39 and 354
119 and 446
15 and 126
-127 and -33
The table shows the melting points and boiling points of some substances. Which substance is a gas at 0oC? [sm-11]
[Substance] Melting Point oC and Boiling Point oC
-39 and 354
119 and 446
15 and 126
-127 and -33
The table shows the melting points and boiling points of some substances. Which substance is a liquid at 30oC? [sm-12]
[Substance] Melting Point oC and Boiling Point oC
-39 and 10
119 and 446
15 and 126
-127 and -33
Air is confined in a glass bottle with a tight screw-top. When the bottle becomes warmer when heated with a hair-dryer, the pressure inside increases because the molecules of air? [sm-13]
become bigger
become smaller
move faster
move slower
Air is in a glass bottle with a tight screw-top. When the bottle becomes cooler when placed in a refrigerator, the pressure inside decreases because the molecules of air? [sm-14]
become bigger
become smaller
move faster
move slower
When the air in a room becomes warmer a hanging balloon blown up with air becomes bigger because the molecules of air? [sm-15]
become bigger
become smaller
move faster
move slower
When the air in a room becomes cooler a hanging balloon blown up with air becomes smaller because the molecules of air? [sm-16]
become bigger
become smaller
move faster
move slower
The table shows the melting points and boiling points of some substances. Which substance is a liquid at 20 oC? [sm-17]
[Substance] Melting Point oC and Boiling Point oC
-142 and -78
-95 and 4
-66 and 42
90 and 189
The table shows the melting points and boiling points of some substances. Which substance is a solid at 20oC? [sm-18]
[Substance] Melting Point oC and Boiling Point oC
-142 and -78
-95 and 4
-66 and 42
90 and 189
The table shows the melting points and boiling points of some substances. Which substance is a gas at -60oC? [sm-19]
[Substance] Melting Point oC and Boiling Point oC
-142 and -78
-95 and 4
-66 and 42
90 and 189
The table shows the melting points and boiling points of some substances. Which substance is a liquid at -10oC and a gas at 10oC? [sm-20]
[Substance] Melting Point oC and Boiling Point oC
-142 and -78
-95 and 4
-66 and 42
90 and 189
Which of the following graphs represents how the temperature of liquid varies as it becomes a solid? [sm-21]
graph 1
graph 2
graph 3
graph 4
Which of the following graphs represents how the temperature of gas varies as it becomes a liquid? [sm-22]
graph 1
graph 2
graph 3
graph 4
Which of the following graphs represents how the temperature of solid varies as it becomes a liquid? [sm-23]
graph 1
graph 2
graph 3
graph 4
Which of the following graphs represents how the temperature of liquid varies as it becomes a gas? [sm-24]
graph 1
graph 2
graph 3
graph 4
Which of the following graphs represents how the temperature of gas varies as it eventually becomes a solid? [sm-25]
graph 1
graph 2
graph 3
graph 4
Which of the following graphs represents how the temperature of solid varies as it eventually becomes a gas? [sm-26]
graph 1
graph 2
graph 3
graph 4
Which of the following is true as a gas is changing to a liquid in condensation? [sm-27]
increase in particle order
temperature rises
particles gain more freedom
energy change is endothermic
Which of the following is true as a gas is changing to a liquid in condensation? [sm-28]
decrease in particle order
temperature rises
particles lose freedom
energy change is endothermic
Which of the following is true as a gas is changing to a liquid in condensation? [sm-29]
decrease in particle order
temperature rises
particles gain freedom
energy change is exothermic
Which of the following is true as a liquid changes to a solid in freezing? [sm-30]
increase in particle order
temperature falls
particles gain freedom
energy change is endothermic
Which of the following is true as a liquid changes to a solid in freezing? [sm-31]
decrease in particle order
temperature stays constant
particles gain freedom
energy change is endothermic
Which of the following is true as a liquid changes to a solid in freezing? [sm-32]
decrease in particle order
temperature falls
particles lose freedom
energy change is endothermic
Which of the following is true as a liquid changes to a solid in freezing? [sm-33]
decrease in particle order
temperature falls
particles gain freedom
energy change is exothermic
Which of the following is true as a solid changes to a liquid in melting? [sm-34]
decrease in particle order
temperature rises
particles lose freedom
energy change is exothermic
Which of the following is true as a solid changes to a liquid in melting? [sm-35]
increase in particle order
temperature stays constant
particles lose freedom
energy change is exothermic
Which of the following is true as a solid changes to a liquid in melting? [sm-36]
increase in particle order
temperature rises
particles gain freedom
energy change is exothermic
Which of the following is true as a solid changes to a liquid in melting? [sm-37]
increase in particle order
temperature rises
particles lose freedom
energy change is endothermic
Which of the following is true as a liquid changes to a gas in boiling? [sm-38]
decrease in particle order
temperature rises
particles lose freedom
energy change is exothermic
Which of the following is true as a liquid changes to a gas in boiling? [sm-39]
increase in particle order
temperature stays constant
particles lose freedom
energy change is exothermic
Which of the following is true as a liquid changes to a gas in boiling? [sm-40]
increase in particle order
temperature rises
particles gain freedom
energy change is exothermic
Which of the following is true as a liquid changes to a gas in boiling? [sm-41]
increase in particle order
temperature rises
particles lose freedom
energy change is endothermic
Which of the following is true as a liquid changes to a gas in evaporation? [sm-42]
decrease in particle order
temperature stays constant
particles lose freedom
energy change is exothermic
Which of the following is true as a liquid changes to a gas in evaporation? [sm-43]
increase in particle order
temperature falls
particles lose freedom
energy change is exothermic
Which of the following is true as a liquid changes to a gas in evaporation? [sm-44]
increase in particle order
temperature stays constant
particles gain freedom
energy change is exothermic
Which of the following is true as a liquid changes to a gas in evaporation? [sm-45]
increase in particle order
temperature stays constant
particles lose freedom
energy change is endothermic
When water vapour in a cloud is gradually cooled, rainwater is formed. This change of state is called? [sm-46]
condensation
distillation
evaporation
saturation
Heat from the Sun changes water from liquid to a gas. This change of state is called? [sm-47]
condensation
distillation
evaporation
saturation
Gases diffuse because they? [sm-48]
are made of rapidly moving particles
have low boiling points
have a low density
easily move as convection currents
Liquids and dissolving solids diffuse because they? [sm-49]
are made of moving particles
have low boiling points
have a low density
easily move as convection currents
The table below shows the melting points and boiling points of substances A to D. Which substance is a gas at 25oC? [sm-50]
[Substance] Melting point oC(mpt), Boiling Point oC(bpt)
mpt = -127o, bpt = -33 oC
mpt = -39o, bpt = 354 oC
mpt = 63o, bpt = 760 oC
mpt = 119o, bpt = 446 oC
The table below shows the melting points and boiling points of substances A to D. Which substance is a liquid at 25oC? [sm-51]
[Substance] Melting point oC(mpt), Boiling Point oC(bpt)
mpt = -127o, bpt = -33 oC
mpt = -39o, bpt = 354 oC
mpt = 63o, bpt = 760 oC
mpt = 119o, bpt = 446 oC
The table below shows the melting points and boiling points of substances A to D. Which substance is a solid at 100oC? [sm-52]
[Substance] Melting point oC(mpt), Boiling Point oC(bpt)
mpt = -127o, bpt = -33 oC
mpt = -39o, bpt = 354 oC
mpt = 63o, bpt = 760 oC
mpt = 119o, bpt = 446 oC
The table below shows the melting points and boiling points of substances A to D. Which substance is a solid at 100oC? [sm-53]
[Substance] Melting point oC(mpt), Boiling Point oC(bpt)
mpt = -127o, bpt = -33 oC
mpt = -39o, bpt = 154 oC
mpt = 99o, bpt = 140 oC
mpt = 101o, bpt = 110 oC
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range 10oC to 90oC? [sm-54] [Substance] Melting point oC(mpt), Boiling Point oC(bpt)
mpt = 0o, bpt = 100 oC
mpt = -200o, bpt = 40 oC
mpt = 20o, bpt = 350 oC
mpt = -110o, bpt = 80 oC
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range -120oC to 20oC? [sm-55] [Substance] Melting point oC(mpt), Boiling Point oC(bpt)
mpt = 0o, bpt = 100 oC
mpt = -200o, bpt = 40 oC
mpt = -40o, bpt = 350 oC
mpt = -110o, bpt = 80 oC
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range 0oC to 100oC? [sm-56] [Substance] Melting point oC(mpt), Boiling Point oC(bpt)
mpt = 0o, bpt = 100 oC
mpt = -200o, bpt = 40 oC
mpt = -40o, bpt = 350 oC
mpt = -110o, bpt = 80 oC
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range -4oC to 50oC? [sm-57] [Substance] Melting point oC(mpt), Boiling Point oC(bpt)
mpt = 0o, bpt = 100 oC
mpt = -200o, bpt = 40 oC
mpt = 40o, bpt = 350 oC
mpt = -110o, bpt = 80 oC
The rate of evaporation of a water does NOT depend on the? [sm-58]
humidity of the surrounding air
depth of the water
surface area of the water
temperature of the water
Which is true about the rate of evaporation of water? [sm-59]
it is speeded up on a humid day
it is due to the escape of the most energetic particles
heat is given out in the process
it is slowed down in a breeze
Which is true about the rate of evaporation of water? [sm-60]
it is speeded up on a dry day
it is due to the escape of the least energetic particles
heat is given out in the process
it is slowed down in a breeze
Which is true about the rate of evaporation of water? [sm-61]
it is speeded up on a humid day
it is due to the escape of the least energetic particles
heat is absorbed in the process
it is slowed down in a breeze
Which is true about the rate of evaporation of water? [sm-62]
it is speeded up on a humid day
it is due to the escape of the least energetic particles
heat is given out in the process
it is speeded up on a breezy day
Which of these statements is true about evaporation? [sm-63]
it is speeded up on a warm day
it is due to the escape of the least energetic particles
heat is given out in the process
it is speeded up on a humid day
The body is cooled down by sweating. This process mainly involves the heat transfer process of? [sm-64]
conduction
convection
evaporation
radiation
Which of the following describes heat transfer due to evaporation? [sm-65]
transfer due to the movement of volumes of gases or liquids
transfer due to loss of energetic particles from the surface of a liquid
transfer by infrared waves which can pass through air
transfer due to the vibration of particles in contact with each other
Which of the following best explains why gases diffuse throughout a container? [sm-66]
there are no attractive forces between the particles of a gas
gases have a low density
gas particles move fast
gas particles are very small
Which of the following best explains why gases have a low density? [sm-67]
the gas particles are very small
the particles are far apart
gas particles move fast
the attractive force between particles are very weak
Which electron arrangement is a Halogen? [as-5]
electron arrangement W
electron arrangement X
electron arrangement Y
electron arrangement Z
Which electron arrangement corresponds to the most reactive metal? [as-6]
electron arrangement W
electron arrangement X
electron arrangement Y
electron arrangement Z
Which electron arrangement corresponds to the first element on period 2 of the Periodic Table? [as-8]
electron arrangement W
electron arrangement X
electron arrangement Y
electron arrangement Z
Which electron arrangement corresponds to the most reactive non-metallic element of the Periodic Table? [as-9]
electron arrangement W
electron arrangement X
electron arrangement Y
electron arrangement Z
Which electron arrangement corresponds to a metal in Group 3 of the Periodic Table? [as-10]
electron arrangement W
electron arrangement X
electron arrangement Y
electron arrangement Z
Which electron arrangements correspond to two elements in the same Group of the Periodic Table? [as-11]
electron arrangement W and X
electron
arrangements X and Z
electron arrangement Y and Z
electron arrangement W and Z
Which electron arrangements correspond to two elements on the same period of the Periodic Table? [as-13]
electron arrangement W and X
electron
arrangements X and Z
electron arrangement Y and Z
electron arrangement W and Z
Which of the elements listed has 1 outer electron? [as-19]
element Q
element R
element Z
element G
Which of the elements listed is a Halogen? [as-20]
element Q
element R
element Z
element G
Which of the elements listed is an Alkali Metal? [as-21]
element Q
element R
element Z
element G
Which of the elements listed would be chemically the most similar? [as-22]
elements Q and R
elements R and A
elements M and X
elements G and M
Which of the elements listed are in the same period? [as-23]
elements Q and R
elements R and A
elements M and X
elements G and M
Which of the elements listed are both Halogen non-metals with 7 outer electrons? [as-25]
elements Z and Y
elements Q and R
elements G and E
elements T and W
Which of the elements listed are both in Group 3? [as-26]
elements Z and Y
elements Q and E
elements G and E
elements D and Y
Which of the elements listed are both Noble Gases? [as-27]
elements Z and T
elements Q and R
elements G and E
elements T and W
The nucleus of an atom consists of? [as-28]
protons and neutrons
neutrons and electrons
protons and electrons
protons only
The Atomic Number of an element is? [as-29]
the number of neutrons in the nucleus
the sum of the protons and neutrons in the nucleus
the number of protons in the nucleus
the number of electrons in the outer shell
The Mass Number of an element is? [as-30]
the number of neutrons in the nucleus
the sum of the protons and neutrons in the nucleus
the number of protons in the nucleus
the number of electrons in the outer shell
Which description corresponds to a neutron? [as-31]
mass = 1/1850, electric charge = -1
mass = 1, electric charge = 0
mass = 1, electric charge = +1
mass = 4, electric charge = +2
Which description corresponds to a proton? [as-32]
mass = 1/1850, electric charge = -1
mass = 1, electric charge = 0
mass = 1, electric charge = +1
mass = 4, electric charge = +2
Which description corresponds to a electron? [as-36]
mass = 1/1850, electric charge = -1
mass = 1, electric charge = 0
mass = 1, electric charge = +1
mass = 4, electric charge = +2
Which is an electron arrangement of an element in Group 5 of the Periodic Table? [as-37]
2.5
2.7
2.8.8
2.8.8.1
Which is an electron arrangement of a Halogen? [as-38]
2.5
2.7
2.8.8
2.8.8.1
Which is the electron arrangement of a Noble Gas? [as-39]
2.5
2.7
2.8.8
2.8.8.1
Which is the electron arrangement of an Alkali Metal? [as-40]
2.5
2.7
2.8.8
2.8.8.1
Which is an electron arrangement of a Noble Gas? [as-41]
2
2.3
2.8.5
2.8.8.2
Which is an electron arrangement of a Period 1 element? [as-42]
2
2.3
2.8.7
2.8.8.1
Which is an electron arrangement of a Period 2 element? [as-43]
2
2.3
2.8.6
2.8.8.2
Which is an electron arrangement of a Group 3 element? [as-44]
2
2.3
2.8.5
2.8.8.2
Which is an electron arrangement of a Group 5 element? [as-45]
2
2.3
2.8.5
2.8.8.2
Which is an electron arrangement of a Period 3 element? [as-46]
2.1
2.3
2.8.5
2.8.8.2
Which is an electron arrangement of a Group 2 element? [as-47]
2
2.3
2.8.6
2.8.8.2
Which is an electron arrangement of a Period 4 element? [as-48]
2
2.4
2.2
2.8.8.2
How many protons does this sodium atom have? [as-1]
11
12
23
44
How many neutrons does this sodium atom have? [as-2]
11
12
23
44
How many neutrons plus protons does this atom have in total? [as-3]
11
12
23
44
How many electrons does this atom have in total? [as-4]
11
12
23
44
Which electron arrangement most likely corresponds to a non-metallic element? [as-7]
electron arrangement W
electron arrangement X
electron arrangement Y
electron arrangement Z
Which electron arrangements corresponds to two very reactive metallic elements of the Periodic Table? [as-12]
electron arrangements W and X
electron arrangements X and Z
electron arrangements Y and Z
electron arrangements W and Z
Which of the following have/has no neutrons? [as-14]
V only
V and Y
W and Y
Y and Z
Which of the following have/has one neutron? [as-15]
V only
W and Y
X and Y
Y and Z
Which of the following have/has two neutrons? [as-16]
V only
W and Y
X and Z
W and X
Which of the following have/has one proton? [as-17]
V only
W and Y
Y and Z
V, W and X
Which of the following have/has two protons? [as-18]
V only
X and Z
Y and Z
V, W and X
Which elements are both likely to be metals? [as-24]
elements Z and Y
elements Q and R
elements G and E
elements T and W
Which of the two particles W, X, Y and Z represent different isotopes of the same element? [as-33] ... Particle W: 12 protons, 14 neutrons, 12 electrons ... Particle X: 13 protons, 14 neutrons, 14 electrons ... Particle Y: 14 protons, 13 neutrons, 14 electrons ... Particle Z: 14 protons, 14 neutrons, 12 electrons
W and X
X and Y
X and Z
Y and Z
The symbol for an isotope of sodium is . Which gives the correct numbers of protons, neutrons and electrons in this atom? [as-34]
11 protons, 13 neutrons, 11 electrons
13 protons, 11 neutrons, 11 electrons
24 protons, 12 neutrons, 13 electrons
24 protons, 13 neutrons, 24 electrons
Which of the following could be the symbol for a proton particle? [as-35]
symbol Q
symbol W
symbol Y
symbol Z
The symbol of an isotope of cobalt is . Which gives the correct numbers of protons, neutrons and electrons in this atom? [as-49]
27 protons, 33 neutrons, 27 electrons
33 protons, 27 neutrons, 27 electrons
60 protons, 33 neutrons, 60 electrons
27 protons, 33 neutrons, 33 electrons
The symbol of an isotope of iron is . Which gives the correct numbers of protons, neutrons and electrons in this atom? [as-50]
31 protons, 26 neutrons, 31 electrons
26 protons, 31 neutrons, 26 electrons
26 protons, 26 neutrons, 31 electrons
31 protons, 31 neutrons, 26 electrons
The symbol for an atom of strontium is . What is the atomic number of the atom? [as-51]
52
128
38
90
The symbol for an atom of strontium is . What is the mass number of the atom? [as-52]
52
128
38
90
The symbol for an atom of strontium is . What is the proton number of the atom? [as-53]
38
90
52
128
The symbol for an atom of strontium is . What is the neutron number of the atom? [as-54]