Question

Amongst the following elements (whose electronic configurations are given below), the one having the highest ionisation energy is

(a) [Ne] 3s² 3p¹

(b) [Ne] 3s² 3p³

(c)  [Ne] 3s² 3p²

(d)  [Ar] 3d¹⁰ 4s² 4s² 4p³

Answer 1

Correct option (b) [Ne] 3s² 3p³

Explanation:

Ionisation energy increases with increasing atomic number in a period. while decreases on moving down the group.