Question

The salt of which of the following cations would exhibit paramagnetism at the GREATEST extent? a. Co3+ b. Cr3+ c. Fe3+ D. Mn3+

Answer 1

Co^3+   1s^2 2s^2 2p^6 3s^2 3p^6 4s^0 3d^6

four unpaired electrons

Cr^3+   1s^2 2s^2 2p^6 3s^2 3p^6 4s^0 3d^3

three unpaired electrons

Fe^3+ 1s^2 2s^2 2p^6 3s^2 3p^6 4s^0 3d^5

five unpaired electrons

Mn^3+ 1s^2 2s^2 2p^6 3s^2 3p^6 4s^0 3d^4

four unpaired electrons

Fe^3+ has more number of unpaired electrons . It exhibit paramagnetism at the GREATEST extent

c. Fe3+ >>>>answer