Group 7 elements Flashcards
1
Q
What are group 7 elements known as?
A
Halogens
2
Q
What are halogens?
A
Non-metals with coloured vapours
3
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
4
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
