Which of the following lanthanoid ions, has zero magnetic moment ? [Ce (z = 58), Sm (z = 62), Eu (z = 63), Yb (z = 70)]`

Options

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

Answer

C

Explanation

`{:(Sm^(2+) [(Xe) 4F^(6)],,Eu^(2+) [(Xe) 4F^(7)],),(Yb^(2+)[(Xe)4F^(14)],,Ce^(2+)[(Xe)4F^(1)5d^(1)],):}`