Question

the elements present in the groups are separated by definite gaps of atomic number into
2,8,8,18,18,32.(explain)

Answer 1

I m not sure about the answer but still
Shells k has 2n^2 simillary L shell has 8 electrons and similar for M and N shell
But there is something such as S, P, D, F Shells which we will study in 11th
I m still jot sure about the answer

Answer 2

Its the Bohr bury's rule i.e. 2nsq ... where n is the no. Of shells...

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