Group 7
- Created by: GreyCP
- Created on: 25-01-18 17:54
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- Group 7
- Halogens
- Exist as diatomic molecules
- e.g. Cl2
- atoms joined by covalent bond
- Exist as diatomic molecules
- Toxic Non-Metals
- Coloured Vapours
- Properties
- Low Boiling & Melting Points
- Increase going down group
- Poor conductors of heat & electricity
- Less Reactive going down group
- Low Boiling & Melting Points
- 7 electrons in outermost shell
- React with metals to form 1- ions
- Called Halides
- A more reactive Halogen will displace a less reactive Halogen from solutions of its salts
- e.g. chlorine would displace bromide ions
- Fluorine will displace all others, but it reacts so violently with water you can't carry our reactions in aq solutions
- A Salt is a bromide or iodide
- They form covalent compounds by sharing electrons with other non-metals
- But they form ionic bonds with metals & the compounds that form have Ionic structures
- Elements
- Fluorine
- Gas
- Chlorine
- Gas
- Bromine
- Liquid
- Iodine
- Dark Grey Solid or Purple Vapour
- Fluorine
- Halogens
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