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Question

From the electronic configuration of the given elements K,L,M and N, which one has the highest ionization potential?

A
M=[Ne]3s23p2
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B
L=[Ne]3s23p3
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C
K=[Ne]3s23p1
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D
N=[Ar]3d10,4s24p3
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Solution

The correct option is D L=[Ne]3s23p3
Let us consider all the elements
element M has two elements in the outermost shell which makes it easy to remove as compared to L which has half filled porbital and is therefore stabler. Even K has only one electron in porbital which makes it easy to remove.
The element N is large since it goes to 3d orbital also. Large size makes it easier to remove an electron since the energy holding it is lesser. Therefore since L has half filled porbital and is quite small in size it will have highest ionization potential.

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