If atomic numbers of nickel and copper a...

If atomic numbers of nickel and copper are 28 and 29 respectively. Which of the following does 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

Verified by Experts

The correct Answer is:

A

`._(28)Ni = [Ar] 3d^(8) 4s^(2), Ni^(2+) = [Ar] 3d^(8)`
`._(29)Cu =[Ar] 3d^(10) 4s^(1), Cu^(+) = [Ar] 3d^(10)`
`Cu^(2+) =[Ar] 3d^(9)`

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