1.

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»

Correct option (b) [Ne] 3s2 3p3

Explanation:

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



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