The ground state electron configuration of Se is:

Question

Quizplus · Accepted Answer

The ground state electron configuration of Se can be determined by filling the orbitals in order of increasing energy. The first 18 electrons will fill the orbitals up to 3p level, which gives [Ar]3s²3d¹⁰. Then, the next two electrons will fill the 4s orbital, giving [Ar]4s²3d¹⁰. Finally, the remaining four electrons will fill the three available 4p orbitals, giving [Ar]4s²3d¹⁰4p⁴. Therefore, the best choice is (C).

The Ground State Electron Configuration of Se Is