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Gd (64) has unpaired electrons with sum...

Gd (64) has ___ unpaired electrons with sum of spin ____

A

`7, 3.5`

B

8, 3

C

6, 3

D

8, 4

Text Solution

Verified by Experts

The correct Answer is:
D
The element Gd(Z=64) show electronic configuration `=[Xe]_(54).4f^(7), 5d^(1), 6s^(2)` Thus, it has 8-unpaired electrons (`4f^(7) and 6d^(1)`) and its sum of spin is 4.
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