Correct statement is

Options

A. `K=4s^(1),Cr=3d^(4)4s^(2),Cu=3d^(10)4s^(2)`
B. `K=4s^(2),Cr=3d^(4)4s^(2),Cu=3d^(10)4s^(2)`
C. `K=4s^(2),Cr=3d^(5)4s^(1),Cu=3d^(10)4s^(2)`
D. `K=4s^(1),Cr=3d^(5)4s^(1),Cu=3d^(10)4s^(1)`

Answer

D

Explanation

`K_((19))=1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),4s^(1)`
`Cr_((24))=1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),3d^(5),4s^(1)`
`Cu_((29))=1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),3d^(10),4s^(1)`