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The general electronic configuration of ...

The general electronic configuration of outer most and penultimate shell is given as `(n-1)s^2(n-1)p^6(n-1)d^x ns^2`. Then for an element with `n = 4` and `x = 7`
The number of unpaired electrons in the divalent cation of the element in isolated gaseous state is 

A

0

B

3

C

4

D

1

Text Solution

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The correct Answer is:
B
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