Which one of the following ions has electronic configuration[Ar] 3d⁶?

Which one of the following ions has electronic configuration[Ar] 3d⁶? (At. no: Mn=25, Fe=26, Co=27, Ni=28)

Options

(a) Ni³⁺
(b) Mn³⁺
(c) Fe³⁺
(d) Co³⁺

Correct Answer:

Co³⁺

Explanation:

Ni³⁺ (28) = [Ar] 3d⁷
Mn³⁺ (25) = [Ar] 3d⁴
Fe³⁺ (26) = [Ar] 3d⁵
Co³⁺ (27) = [Ar] 3d⁶

admin:

Related Questions

  1. The silver salt of a fatty acid on refluxing with an alkyl halide gives an
  2. Aspirin is obtained by the reaction of salicylic acid with
  3. Gas A is bubbled through slacked lime, a white precipitate is formed.
  4. If a gas expands at constant temperature , it indicates that
  5. In a lime kiln, to get higher yield of CO₂, the measure that can be taken is