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QAIPMT-2009-Ch-2121: NEET 2009 Chemistry - Class 11 AIPMT-2009-Ch-2121 Solution: Amongst the elements with following electronic configurations,…

Amongst the elements with following electronic configurations, which one of them may have the highest ionisation energy?

Multiple Choice Options

A Ne $[3s^2 3p^2]$
B Ar $[3d^{10} 4s^2 4p^3]$
C Ne $[3s^2 3p^1]$
D Ne $[3s^2 3p^3]$

Step-by-Step Verified Solution

Among the given options (a), (c) and (d), the option (d) has the highest ionisation energy because of extra stability associated with half-filled 3p-orbital. In option (b), the presence of 3d 10 electrons offers shielding effect, as a result the 4p 3 electrons do not experience much nuclear charge and hence the electrons can be removed easily.

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