Group7- oxidising power decreases down the group? Wut

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username4347578
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I thought that further down group 7, the halogens lose electrons more easily so shouldn’t the oxidising power Increase rather than decrease?
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username4347578
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I’m so confused coz my teacher said down a group: the atomic radius gets bigger
Shielding increases
Nuclear attraction decreases
So more difficult to gain electrons do oxidising power decreases down the group

But should it increase?
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minichef30
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Yeah, and to add onto that.. it is important to clarify that it is the nucleus that is attracting the electrons.. so therefore this positive charge is further away from the electron to be accepted
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username4347578
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Ah thank you! So for group 2 metals, the more reactive they are the easier they lose an electron
However for halogen the further down the group, the harder it is to gain an electron so less reactive further down the group?
For group
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reinaadira
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(Original post by ArtmisKco)
I thought that further down group 7, the halogens lose electrons more easily so shouldn’t the oxidising power Increase rather than decrease?
Further down the Group, the halogens gain electrons less easily. Halogens don't tend to lose electrons. If you're doing GCSE I don't think you need to know about Halogens losing electrons though.

So they are reduced less easily therefore oxidising power decreases. Oxidising power in terms of if they can act as an oxidising agent.
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