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The atomic numbers of Ni and Cu are 28 a...

The atomic numbers of `Ni` and `Cu` are `28` and `29` respectively. The electronic configuration `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)` represent

A

`Cu^(+)`

B

`Cu^(2+)`

C

`Ni^(2+)`

D

`Ni`

Text Solution

Verified by Experts

The correct Answer is:
A
Electronic configuration of
`{:(Ni[Ar]3d^(8)4s^(2),Ni^(2+)-[Ar]3d^(8)),(Cu-[Ar]3d^(10)4s^(1),Cu^(+)-[Ar]3d^(10)),(Cu^(2+)-[Ar]3d^(9),):}`
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