AP EAMCET2014Chemistryd and f Block Elements
Which one of the following ions has same number of unpaired electrons as those present in V ³⁺ ion?
Options
- AFe ³⁺
- BNi ²⁺
- CMn ²⁺
- DCr ³⁺
Correct answer
B. Ni ²⁺
Step-by-step solution
aligned ₂₃ ~V & =[ Ar ] 3 d^3 4 s^2 ~V ³⁺ & =[ Ar ] 3 d^2 4 s^0 2 unpaired electrons ₂₆ Fe & =[ Ar ] 3 d^6 4 s^2 Fe ³⁺ & =[ Ar ] 3 d^5 4 s^0 5 unpaired electrons ₂₈ Ni & =[ Ar ] 3 d^8 4 s^2 Ni ²⁺ & =[ Ar ] 3 d^8 4 s^0 2 unpaired electrons ₂₅ Mn & =[ Ar ] 3 d^5 4 s^2 Mn ²⁺ & =[ Ar ] 3 d^5 5 unpaired electrons ₂₄ Cr & =[ Ar ] 3 d^5 4 s^1 Cr ³⁺ & =[ Ar ] 3 d^3 4 s^1 3 unpaired electrons aligned