AQA · Chemistry · 8462
GCSE Chemistry: Group
Atomic structure and the periodic table · AQA GCSE Chemistry (8462), specification point 4.1.2.4. Cards are generated from the exam board's own specification for "Group", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What are the elements in Group 0 of the periodic table called?
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The noble gases.
Why are the noble gases unreactive?
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Their atoms have stable (full) arrangements of electrons in their outer shell, so they do not need to gain, lose or share electrons.
How many electrons do most noble gases have in their outer shell?
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Eight (except helium, which has two).
Which noble gas has only two electrons in its outer shell?
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Helium.
How do the boiling points of the noble gases change going down Group 0?
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They increase with increasing relative atomic mass.
Which has the higher boiling point: neon or krypton?
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Krypton — it is further down Group 0, with a larger relative atomic mass, so its boiling point is higher.
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