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Question

Two p-block elements x (outer configuration ns2np3) and z (outer configuration ns2np4) occupy neighbouring positions in a period. Using this information which of the following is correct with respect to their ionization potential Ix and Iz.

A
Ix>Iz
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B
Iz>Ix
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C
Iz=Ix
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D
Relation between Ix and Iz is uncertain.
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Solution

The correct option is A Ix>Iz
Element x has a stable half-filled electronic configuration. Therefore due to its stable electronic configuration, Ix>Iz.

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