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Question

K+,Ar,Ca2+ and S2 contains:

A
same electronic configuration and atomic volume
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B
different electronic configuration but same IP
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C
same electronic configuration but different atomic volume
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D
none of these
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Solution

The correct option is A same electronic configuration and atomic volume
Electronic configuration of: ,
K+ is 2,8,8
Ar is 2,8,8
Ca+2 is 2,8,8
S2 is 2,8,8
Hence electronic configuration of all the four species is equal
Hence the the structure of the species remains the same which leads to the equal atomic volume.

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