Question

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.

(a) Write down electronic configuration of all of them.

(b) Is the number of valence electrons same for all these elements?

(c) Is the number of shells the same in theses​

Answer 1

(a)Li - 2, 1

Be - 2,2

B - 2,3

C - 2,4

N - 2,5

O - 2,6

F - 2,7

(b) No

(c) yes.

Plz mark as brainalist.