Question

how to find the elements belong to which group with an example​

Answer 1

Answer:

example :-

let's take 2 examples for better understanding :-

1st

Sodium

atomic no = 11

valence shell conf = 3s^1

so that 1represent group

in case of

magnesium

atomic no = 12

valence shell comf =3s^2

that 2 represent group 2nd .

in case of P block we add 12 to get the group no as in case of boron .

gud day