Which one of the following element has the highest ionization energy?

[N e] 3 s^{2} 3 p^{1}

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[N e] 3 s^{2} 3 p^{2}

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[N e] 3 s^{2} 3 p^{3}

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[A r] 3 d^{10} 4 s^{2} 4 p^{3}

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Solution

The correct option is C $[N e] 3 s^{2} 3 p^{3}$
$[N e] 3 s^{2} 3 p^{3}$ is a stable configuration because the outer sub-shell is half-filled. Half filled configurations are stable configurations.

The one half-filled and one completely filled orbital gives stability. Hence, It will be difficult to remove an electron from it and will take more energy.

Hence, $[N e] 3 s^{2} 3 p^{3}$ has the highest ionization energy among the given elements.

Hence, the correct option is $C$

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Similar questions

[N e] 3 s^{2} 3 p^{3}

[N e] 3 s^{2} 3 p^{4}

[N e] 3 s^{2} 3 p^{5}

[N e] 3 s^{2} 3 p^{2}

4

= [N e] 3 s^{2} 3 p^{3}

= [A r] 3 d^{10} 4 s^{2} 4 p^{3}

= [H e] 2 s^{2} 2 p^{5}

= [N e] 3 s^{1}

Question 22

Amongst the following elements whose electronic configuration are given below, the one having the highest ionisation enthaply is

(a) $[N e] 3 s^{2} 3 p^{1}$

(b) $[N e] 3 s^{2} 3 p^{3}$

(d) $[A r] 3 d^{10} 4 s^{2} 4 p^{3}$

Which element from the following has the highest ionisation energy ?

(a) P, Na, Cl (b) F, O, Ne (c) Ne, He, Ar

Explain your choice.

[N e] 3 s^{2} 3 p^{3}

[N e] 3 s^{2} 3 p^{4}

[N e] 3 s^{2} 3 p^{5}

[N e] 3 s^{2} 3 p^{2}

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