Question

Which of the following has the maximum number of unpaired electrons? (a) Mg²⁺ (b) Ti³⁺(c) V³⁺(d) Fe²⁺

Answer 1

Answer

Mg2+ : 1s2 2s2 2p6 : no unpaired electron Ti3+ : 1s2 2s2 2p6 3s2 3p6 3d1 : one unpaired electron V3+ : 1s2 2s2 2p6 3s2 3p6 3d1 : two unpaired electrons Fe2+ : 1s2 2s2 2p6 3s2 3p6 3d1 : four unpaired electrons

Answer 2

Answer:

Fe2+ has maximum no of unpaired electrons

Please refer to attached

Note- These are cations (positively charged ions), so take special care while writing the electronic configuration

for eg- atomic no of Fe is 26

but in case of Fe2+ it is (26-2= 24)