What is the atomic number of the element...

What is the atomic number of the element with `M^(2+)` ion having electronic configuration `[Ar] 3d^(8)` ?

A

28

B

26

C

25

D

27

Verified by Experts

The correct Answer is:

A

`[Ar] 3d^(8)` is `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(8)`
`:.` no. of electrons in `M^(2+) = 26`
`:.` Atomic number of `M = 26+2 =28`

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