Which one of the following is a correct electronic configuration of Sodium?

(a) 2, 8

(b) 8, 2, 1

(c) 2, 1, 8

(d) 2, 8, 1

(d) 2, 8, 1

EXPLANATION

The atomic number of sodium is 11.

11 electrons are distributed as follows:-

K-shell has 2 electrons; L-shell has 8 electrons; M-shell has 1 electron