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C2: The periodic table (2.4: Group 7 - the halogens (At room temperature…
C2: The periodic table
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2.5: Explaining trends
Reactivity within groups
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Going down a group, there are more occupied shells and the atoms get larger
As the atoms get larger, the electrons in the outer shell are less strongly attracted by the nucleus
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When metals react they loose electrons, so the reactivity of metals increases going down a group
When non-metals react they gain electrons, so the reactivity of non-metals decreases going down a group
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