AQA · Chemistry · 8462
GCSE Chemistry: Group
Atomic structure and the periodic table · AQA GCSE Chemistry (8462), specification point 4.1.2.6. 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 name is given to the elements in Group 7 of the periodic table?
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The halogens.
Why do the Group 7 elements have similar chemical reactions?
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They all have seven electrons in their outer shell.
Are the halogens metals or non-metals?
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Non-metals.
The halogens consist of molecules made of ? of atoms.
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pairs
How does relative molecular mass change going down Group 7?
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It increases — the further down the group, the higher the relative molecular mass.
How do melting and boiling points change going down Group 7?
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They increase — elements further down the group have higher melting and boiling points.
How does reactivity change going down Group 7?
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Reactivity decreases going down the group.
In Group 7, a more reactive halogen can ? a less reactive halogen from an aqueous solution of its salt.
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displace
Can bromine displace chlorine from aqueous sodium chloride? Why or why not?
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No — bromine is less reactive than chlorine, and only a more reactive halogen can displace a less reactive one from its salt solution.
Which halogen is more reactive: chlorine or iodine?
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Chlorine — reactivity decreases going down Group 7, and chlorine is higher in the group than iodine.
Which halogen has the highest boiling point: chlorine, bromine or iodine?
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Iodine — boiling point increases going down Group 7.
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