In which of the following ions does the metal ion have a 3d⁷ electron configuration? A)[NiCl₄]^2- B)[Mn(H₂O)₆]²⁺ C)[CoCl₄]^2- D)[Co(NH₃)₅Cl]²⁺ E)[Co(NH₃)₄Cl₂]⁺

Question

Quizplus · Accepted Answer

The electron configuration given for the metal ion is 3d⁷. This indicates that the metal ion has 3 electrons in the 3d sub-shell, 1 electron in the 4s sub-shell, and no electrons in the 4p sub-shell. The only ion that matches this electron configuration is [CoCl₄]^2-.

In Which of the Following Ions Does the Metal Ion