Q1(a) Fewer than one quarter of the elements are
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive .
(b) Non-metal elements are found in the groups at the
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive hand side of the periodic table.
(c) The elements in Group 7 the
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive , and Group 0 the noble
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive , have the typical properties of
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive - they have
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive melting points and boiling points.
(d) As you go up the group the density, and melting and boiling points get
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive .
Q2(a) The noble gases are all
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive gases at room temperature and pressure.
(b) They are chemically very
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive gases and exist as
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive atoms rather than as
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive gases like other gaseous
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive such as oxygen O
2 , or hydrogen H
2 .
(c) They are used in electrical discharge tubes eg '
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive ' lights and as
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive gases in filament lamps because they are so unreactive and will not
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive the filament.
Q3(a) The first element in the Group,
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive , has a density much
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive than air and is used in balloons.
(b) Unreactive helium is safer to use in balloons than
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive which is
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive in air.
(c) They are very
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive because the outer
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive of electrons is
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive .
(d) This means the atom does not wish to gain, share of donate electrons to form a chemical
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive .
Q4(a) All of the elements on the
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive of the Periodic Table are
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive eg Group 1 the
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive metals, Group 2 and in the
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive the
alkali bond burn colourless diatomic elements flammable full gases halogens helium higher hydrogen inert left low lower metals middle neon non-metals right shell single transition unreactive metals.