Halogens
- Created by: CoolKid
- Created on: 28-02-13 21:00
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Halogens - Group 7
- Poisonous
- Diatomic molecules
- Non metals
- React in similar ways
- 7 electrons in outer shell
- Very reactive
- Form 1- ions
- Reactivity decreases down the group; outer shell is further from positive nucleus, forces of attraction get less.
- Form ionic bonds with metals and covalent bonds with non metals.
States at room temp:
- Flourine - yellow gas
- Chlorine - green gas
- Bromine - dark red liquid (forms red/brown vapour)
- Iodine - dark grey solid (purple vapour)
- Astatine - black solid
Tests:
- Chlorine gas - bleaches damp indicator…
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