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. In the manufacture of cement which of the following is used
  2. If avagadro number is changed what changes
  3. Which of the following is obtained when sodium phenoxide is heated with ethyl
  4. Chromatography is a valuable method for the separation, isolation,purification
  5. The complex [CoF₆]⁴⁻ is