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Question

Valence shell electronic configuration of Cr2+ is:

A
4s0 3d4
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B
4s2 3d2
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C
4s2 3d0
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D
3p6 4s2
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Solution

The correct option is A 4s0 3d4
Explanation :
Cr has the electronic configuration of: 4s1 3d5 from which we remove two electrons. So the electronic configuration is: 4s0 3d4

Cr2+ (22 electrons) : [Ar]3d4

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