Question

Which one of the following complexes? [Atomic numbers, Mn=25, Fe = 26, Co = 27, Ni = 28]
A. `[Fe(CN)_(6)]^(4-)`
B. `[Mn(CN)_(6)]^(4-)`
C. `[Co(NH_(3))_(6)]^(3+)`
D. `[Ni(NH_(3))_(6)]^(2+)`

Answer 1

Correct Answer - 4
All octahdral `Ni^(2+)` complexes are outer orbital complexes.