[jared (OP)]

Why do group 7 elements become less reactive as you go down the group?

[lyner]

The 'School' reason for this is the 'screening' effect of the inner shells of (-) electrons which gives the spare 'slot' less attraction to the (+) nucleus - as you go down the table because there are more shells.

[Chemistry4me]

why do group 7 elements be come less reactive as you go down the group??
need a to know for my coursework hellp []

Why group seven? It seems a bit... random, I would have thought gruop 17 would be more appropriate [] Did you mean group 17?