Which set does not show correct matching?

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Sc3+[Ne]3s23p6 Zero group

Fe2+[Ar]3d6 VIII group

Cr [Ar] 3d54s1 VI B group

All of the above

answer is A.

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Detailed Solution

Sc3+18e−:[Ne]3s23p6 Sc:[Ne]3s23p64s23d1Thus, d-block III B group.Thus, given matching is incorrect.

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