Transition elements show magnetic moment due to spin and orbital motion of electrons. Which of the following metallic ions have almost same spin only magnetic moment?

Options

A. `Co^(2+)`
B. `Cr^(2+)`
C. `Mn^(2+)`
D. `Cr^(3+)`

Answer

A, D

Explanation

(a,d) Both `Co^(2+)` and `Cr^(3+)` have similar atomic radii because of lanthanoid contraction.