From the electronic configuration of the elements A, B and C given below:
$space space straight A space colon space 1 straight s squared space 2 straight s squared space 2 straight p subscript straight x superscript 1 space space 2 straight p subscript straight y superscript 1 space space straight B thin space colon space 1 straight s squared space 2 straight s squared space 2 straight p subscript straight x superscript 2 space 2 straight p subscript straight y superscript 1 space 2 straight p subscript straight z superscript 1 space space straight C thin space colon space 1 straight s squared space 2 straight s squared space 2 straight p subscript straight y superscript 1 space 2 straight p subscript straight z superscript 1$
(i) Which one has least negative electron gain enthalpy and
(ii) Which one has highest ionisation enthalpy value?

Solution

(i) Element having lowest negative electron gain enthalpy is C.
(ii) Element having highest I.E₁ value is C.

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