Among the following elements (whose electronic configuration is given) the one having the highest ionisation energy is:

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

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

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

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[N e] 3 s^{2}

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Solution

The correct option is A $[N e] 3 s^{2} 3 p^{3}$
$I ε$ highest $=$ Non-metal $>$ Metal $(S^{2})$
$P^{3}$ More
half filled electropositive
more stable so less $I ε$

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

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

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}

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.

{[Ne]3s}^{2}

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