Halogens
- Created by: frejwhit
- Created on: 04-06-19 17:17
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- The Halogens
- 7 Outer Electrons
- group 7 so have 7 electrons in their outer shell
- gain 1 electron to get a full outer shell
- form a negative ion
- Diatomic Molecules
- halogens share electrons to make diatomic molecules
- Salts
- metal + non metal = salt
- a compound where all the ions have a full outer shell
- Reactivity
- less reactive down the group
- atoms gain more electron shells
- larger atomic radius
- weaker attraction between nucleus and electron
- atoms gain more electron shells
- less reactive down the group
- Chlorine
- pale green
- gas
- testing for chlorine
- Insert damp litmus paper into a test tube containing a gas
- positive - paper will bleach then tun red
- Iodine
- dark grey
- solid
- Bromine
- red - brown
- liquid
- 7 Outer Electrons
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