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

Options

A. `Cu^(+)`
B. `Ni`
C. `Ni^(2+)`
D. `Cu^(3+)`

Answer

A

Explanation

`Ni(Z = 28)is [Ar] 3d^(8)4s^(2)`
`Ni^(2+)(Z = 28)is [Ar] 3d^(8)`
`Cu (Z = 29)is [Ar] 3d^(10)4s^(1)`
`Cu^(+) (Z = 29)is [Ar] 3d^(10)`