Group 7 elements Flashcards by chelsea bradley | Brainscape

Q

What are group 7 elements known as?

A

Halogens

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Q

What are halogens?

A

Non-metals with coloured vapours

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Q

What are the properties of the first 4 halogens?

A

Fluorine: Very reactive, poisonous, yellow gas
Chlorine: Fairly reactive, poisonous, dense green gas
Bromine: Poisonous, dense, re/brown, volatile liquid
Iodine: Dark grey crystalline solid OR purple vapour

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Q

What happens as you go down group 7?

A

Becomes less reactive (harder to gain electrons)
Higher melting/boiling points
Higher relative atomic mass

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