NEET2004Chemistryd and f Block ElementsActual
Among the following series of transition metal ions, the one where all metal ions have 3 d^2 electronic configuration is: [At. no.s Ti =22, ~V =23, Cr =24, Mn = 25]
Options
- ATi ³⁺, V ²⁺, Cr ³⁺, Mn ⁴⁺
- BTi ⁺, V ⁴⁺, Cr ⁶⁺, Mn ⁷⁺
- CTi ⁴⁺, V ³⁺, Cr ²⁺, Mn ³⁺
- DTi ²⁺, V ³⁺, Cr ⁴⁺, Mn ⁵⁺
Correct answer
D. Ti ²⁺, V ³⁺, Cr ⁴⁺, Mn ⁵⁺
Step-by-step solution
aligned Ti ₂₂ & =3 d^2 4 s^2 ; & Ti ²⁺ & =3 d^2 ~V ₂₃ & =3 d^3 4 s^2 ; & V ³⁺ & =3 d^2 Cr ₂₄ & =3 d^4 4 s^2 ; & Cr ⁴⁺ & =3 d^2 Mn ₂₅ & =3 d^5 4 s^2 ; & Mn ⁵⁺ & =3 d^2 aligned Related Theory Mn ²⁺ has the maximum number of unpaired electrons (5) and hence has the maximum magnetic moment.