Gap-fill worksheet question Quiz "The GROUP 0 NOBLE GASES"

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   bond      burn      colourless      diatomic      elements      flammable      full      gases      halogens      helium      higher      hydrogen      inert      low      lower      neon      non-metals      right      shell      single      unreactive   
helium1.gif(1)(a) Fewer than one quarter of the elements are .
(b) Non-metal elements are found in the groups at the hand side of the periodic table.
(c) The elements in Group 7 the , and Group 0 the noble , have the typical properties of - they have melting points and boiling points.
(d) As you go up the group the density, and melting and boiling points get .

neon1.gif(2)(a) The noble gases are all gases at room temperature and pressure.
(b) They are chemically very gases and exist as atoms rather than as gases like other gaseous such as oxygen O2, or hydrogen H2.
(c) They are used in electrical discharge tubes eg '' lights and as gases in filament lamps because they are so unreactive and will not the filament.

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

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