1.

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

Answer»

`[Ne]3S^(2)3P^(1)`
`[Ne]3s^(2)3p^(3)`
`[Ne] 3s^(2)3p^(2)`
`[Ar]3d^(10)4S^(2)4p^(3)`

Solution :The configuration is half filled.The choice D also has half filled configuration but 4p orbitals lie FARTHER awayfrom nucleus and can be easily removed.


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