Question

which one of the following is a correct electronic configuration of chlorine option- (a) 2,8. (b) 8,2,7. (c) 2,7,8. (d) 2,8,7​

Answer 1

Answer:

(d) 2,8,7

Explanation:

because chlorine's atomic number = 17.

It's electronic configuration = 2,8,7 (K = 2, L = 8, M = 7)

the Bohr Bury scheme is 2n² where n is the shell number.

K is 1st shell so maximum number of electrons in the shell = 2×1² = 2

L is 2nd shell so maximum number of electrons in the shell = 2×2² = 2×2×2 = 8

just like that other shell have different maximum number of electrons.

so the chlorine's electron configuration = 2 in K, 8 is L and 7 in M = 2,8,7

K and L have maximum electron in their shell.

hope it helps.