Doc Brown's Chemistry

Answers to the GCSE word-fill worksheet questions on the Group 0 Noble Gases

GCSE/IGCSE Noble Gas Notes * GCSE/IGCSE m/c Quiz on Noble Gases

Q1(a) Fewer than one quarter of the elements are non-metals.
(b) Non-metal elements are found in the groups at the right hand side of the periodic table.
(c) The elements in Group 7 the halogens, and Group 0 the noble gases, have the typical properties of non-metals - they have low melting points and boiling points.
(d) As you go up the group the density, and melting and boiling points get higher.

Q2(a) The noble gases are all colourless gases at room temperature and pressure.
(b) They are chemically very unreactive gases and exist as single atoms rather than as diatomic gases like other gaseous elements such as oxygen O₂, or hydrogen H₂.
(c) They are used in electrical discharge tubes e.g. 'neon' lights and as inert gases in filament lamps because they are so unreactive and will not burn the filament.

Q3(a) The first element in the Group, helium, has a density much lower than air and is used in balloons.
(b) Unreactive helium is safer to use in balloons than hydrogen which is flammable in air.
(c) They are very unreactive because the outer shell of electrons is full.
(d) This means the atom does not wish to gain, share of donate electrons to form a chemical bond.

Q4(a) All of the elements on the left of the Periodic Table are metals eg Group 1 the alkali metals, Group 2 and in the middle the transition metals.

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