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322021
Group VII - The Halogens
Description
GCSE Chemistry (C3) Mind Map on Group VII - The Halogens, created by jadepalmer98 on 02/11/2013.
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c3
chemistry
chemistry
c3
gcse
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jadepalmer98
, updated more than 1 year ago
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jadepalmer98
over 10 years ago
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Resource summary
Group VII - The Halogens
As you go down group 7 the halogens become...
1) Less reactive
2) Higher melting point
3) Higher boiling point
Halogens are all non metals with coloured vapours...
Fluorine - very reactive, poisonous yellow gas
Chlorine - fairly reactive, poisonous dense green gas
Bromine - dense, poisonous red-brown volatile liquid
Iodine - dark grey crystalline solid/purple vapour
All form molecules which are pairs of atoms
F2
F
F
Cl2
Cl
Cl
Br2
Br
Br
I2
I
I
Do both Ionic and covalent bonding
Form I- ions when they bond with metals
Form covalent bonds with non-metals to form molecules like these....
C
Cl
Cl
Cl
Cl
Carbon tetrachloride (CCl4)
Cl
H
Hydrogen Chloride (HCl)
React with metals to form salts
React with most metals, including iron and aluminium to form salts or 'metal halides'
More reactive halogens will displace less reactive ones
Chlorine can displace bromine and iodine from a solution of bromide or iodine
Bromine will also displace iodine because of the trend in reactivity
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