Question

The family of non metals having valency one

Answer 1

Yes ....... this is true for halogens only (group 17 in the modern periodic table) as they have 7 valence electrons due to which they can only accept only 1 electron (to complete their octet ) and hence have valency 1.

Answer 2

I think ur question is about helogen family......
for helogen family it is correct....
they have one valance electron in their valance cell


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