Which one of the following ions has electronic configuration [ Ar ] 3 ~d ^6 ? (At. no: Mn =25, Fe =26, Co =27, Ni =28 )

Step-by-step solution

Key Idea Write the electronic configurations of given ions and find the correct answer. aligned Ni ³⁺(28) & =[ Ar ] 3 ~d ^7 Mn ³⁺(25) & =[ Ar ] 3 ~d ^4 Fe ³⁺(26) & =[ Ar ] 3 ~d ^5 Co ³⁺(27) & =[ Ar ] 3 ~d ^6 aligned