Which of the following species has the electron configuration [Ar]3d³? A)Sc B)V³⁺ C)Cr³⁺ D)Fe³⁺

Question

Quizplus · Accepted Answer

The electron configuration [Ar]3d³ belongs to an atom in the excited state since it has unpaired electrons in both 3d and 4s orbitals. Only the element chromium (Cr) has this electron configuration in its ground state. Scandium (Sc) has [Ar] 3d1 4s2, vanadium (V) has [Ar] 3d3 4s2, and iron (Fe) has [Ar] 3d6 4s2 electron configurations. Therefore, the only option that matches the given electron configuration is option C, which is Cr.

Which of the Following Species Has the Electron Configuration [Ar]3d3

Which of the Following Species Has the Electron Configuration [Ar]3d³