Question

Write the electronic configuration of (i) `Mn^(4+) (ii) Fe^(3+) (iii) Cr^(2+) ` and `Zn^(2+)`. Report the number of upaired electrons in each case.

Answer 1

`{:(" Species","Electronic configuration","No . of unpaired electrons",,),((i) Mn^(4+)(Z=25)," "1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(3), " "3,,),((ii) Fe^(3+)(Z=26)," "1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(5)," "5,,),((iii)Cr^(2+)(Z=24)," "1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(4)," "4,,),((iv) Zn^(2+)(Z=30)," "1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)," "0,,):}`