GROUP 1 ELEMENTS GET MORE REACTIVE AS THEY GO DOWN THE GROUP BECAUSE...?

the idea is correct

but

you used 'atoms' where you should have used 'electrons'

As group one elements go down the group they get more reactive. This is because the elements towards the bottom of the group have more ELECTRONS and therefore more shells, having more shells means that there are going to be some ELECTRONS that are fairly far from the nucleus and although the nucleus is going to try and hold them in there are not as stable, making the element as a whole quite unstable. This then makes that element more reactive.

the outer shell single electron is, therefore, weakly held and rather easy to remove

team 2 factors have 2 valence electron, team a million factors basically have a million Valence electron. it takes extra means to lose 2 electrons and much less to lose a million electron. hence team 2 factors are much less reactive than grp a million .

the polarizability inc. and hence bond formations inc.