1
Q
What are halogens
A
Group 7 elements
F, Cl, Br, I
2
Q
State of halogens at room temperature
A
Fluorine gas
Chlorine gas
Bromine liquid
Iodine solid
3
Q
How does reactivity change down Group 7
A
Reactivity decreases
4
Q
Why reactivity decreases down Group 7
A
More shielding
Outer shell further
Harder to gain electron
5
Q
What ions do halogens form
A
Gain 1 electron
Form negative ions
6
Q
Example displacement reaction
A
Cl2 + 2KBr → 2KCl + Br2
7
Q
Colour trend of halogens
A
Fluorine pale yellow
Chlorine green
Bromine red-brown
Iodine grey solid, purple vapour
8
Q
Trend in boiling point down Group 7
A
Increases
9
Q
Why boiling point increases
A
More electrons
Stronger intermolecular forces
10
Q
A
Chemistry aqa gsce
flashcards
Decks in class (13)
# Cards
-
AQA Chemistry Topic 2: Bonding, Structure & the Properties of Matter22
-
revision for paper 157
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Topic 3: Quantitative Chemistry (AQA GCSE Chemistry)18
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Topic 4: Chemical Changes (AQA GCSE Chemistry – Combined Science)33
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Topic 5: Energy Changes (AQA Chemistry – Combined Science)21
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topic 6 The Rate and Extent of Chemical Change20
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Topic 7 Organic chemistry12
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Topic 8 Chemical Analysis12
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r Topic 9 – Chemistry of the Atmosphere9
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topic 1010
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Alkali metals,9
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Halogens10
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Noble Gases7
