Question

1. On going through the modern periodic table it is seen that the
elements Li, Be, B, C, N, O, F and Ne belong to the period-2.
Write down electronic configuration of all of them.
2. Is the number of valence electrons same for all these elements?
3. Is the number of shells the same in these?
18​

Answer 1

Answer:

They have same valency electrons but not same in no of shells