Gap-fill worksheet question Quiz "The GROUP 1 ALKALI METALS"

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   1      alkali      alkaline      atomic number      boiling      chlorine      cold      colourless      compounds      dense      density      dissolve      down      explosion      faster      fizzing      flame      float      floats      green      hydrogen      hydroxide      hydroxides      lithium      low      lower      melting      more      NaCl      NaOH      oxides      pH 14      pH 7      potassium      purple      sodium      soft      sulfides      universal      white   
(1)(a) The elements in Group of the periodic table are known as the metals because they form oxides or which dissolve in water to give solutions of .
(b) They are metals with density and the first three in the Group are less than water, and so .
(c) They have unusually low points and the solids are quite .

(2)(a) They react with non-metals to form e.g. with oxygen to form , sulfur to form and to form chlorides.
(b) These salt-like compounds are solids which in water to form neutral solutions of .
(c) The formula for sodium chloride is , and sodium hydroxide is .

MwaterAnim.gif(3)(a) The Alkali Metals react exothermically with water releasing and forming soluble alkaline hydroxides.
(b) When a piece of , sodium or potassium is placed in water the metal because of its low .
(c) It and may melt and move around the surface with lots of . The more reactive the metal, the the reaction with water.
(d) A simple laboratory test for the gas is that when a test tube of the gas is held to a the gas burns in the air with a squeaky .
(e) During the reaction indicator will turn from to .
eg sodium + water ==> +

(4) In Group 1, the further the group with increase in , the reactive the alkali metal and the its melting point and point.

(5) When heated in a bunsen flame metal or compounds give a yellow flame colour and metal or compounds give a purple colour in a hot flame.

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