Which of the following lanthanoid ions is diamagnetic? (Atomic number of `Ce=58,Sm=62,Eu=63,Yb=70`]

Options

A. `Ce^(2+)`
B. `Sm^(2+)`
C. `Eu^(2+)`
D. `Yb^(2+)`

Answer

D

Explanation

`""_(70)Yb=[Xe]" "4f^(14)5d^(0)6s^(2)`
`Yb^(+2)=[Xe]" "4f^(14)`
`n=0 therefore` Diamagnetic