Group 7 - the Halogens
- Created by: Jo Wells
- Created on: 09-04-13 19:42
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- Group 7 - the Halogens
- as you go DOWN =
- higher boiling point
- higher melting point
- less reactive
- is harder to gain an extra electron
- fluorine, chlorine, bromine, iodine & astatine
- are non-metals with coloured vapours
- fluorine = v. reactive, poisonous, yellow gas
- chlorine = fairly reactive, poisonous, dense green gas
- bromine = dense, poisonous, red-brown volatile liquid
- iodine =
- purple vapour
- dark grey crystalline
- all exist as molecules that are pairs of atoms
- form ionic bonds with metals
- called halides
- form 1- ions
- called halides
- e.g. Na+Cl-
- more reactive halogens will displace less reactive ones
- from an aqueous solution of its salt
- as you go DOWN =
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