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Total number of d electrons present in a...

Total number of d electrons present in an element with atomic number 78 is :-

A

8

B

58

C

29

D

38

Text Solution

Verified by Experts

The correct Answer is:
C
Atomic Number 78
`Sc" " - " "_(30)Zn " " 3d e^(-)" " -" " 10`
`Y " "- " "_(48)Cd" " 4d e^(-) " "- " "10`
`La" " - " "_(80)Hg " " 5d e^(-)" " - " "10`
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