Group 7

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4 Terms

1
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Boiling point down group

INCREASES

increase in atomic radius

more electron shells

more london forces

2
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reactivity down group

DECREASES

increased radius

increased electron shielding makes it harder to attract an electron

3
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Displacement

When a more reactive element replaces a less reactive element

4
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Diatomic

all halogens have two atoms bonded

Cl2 Br2 etc