Among the following lanthanoid ions, the paramagnetic ion is

Options

A. `Ca^(4++)`
B. `Yb^(2+)`
C. `Lu^(3+)`
D. `Eu^(2+)`

Answer

D

Explanation

`{:(Cerarr[Xe]4f^(1)5d^(1)6s^(2),,Ce^(4+)rarr[Xe]),(Ybrarr[Xe]4f^(14)6s^(2),,Yb^(2+)rarr[Xe]4f^(14)),(Lurarr[Xe]4f^(14)5d^(1)6s^(2),,Lu^(3+)rarr[Xe]4f^(14)),(Eurarr [Xe]4f^(7)6s^(2),,Eu^(2+)rarr [Xe]4f^(7)):}`