Chemistry

Problem

An element is located in Period 4 and Group 16 of the periodic table. Which of the following is its ground-state electron configuration? a)

[\text{Ar}]\,4s^{2}\,3d^{10}\,4p^{6}

[\text{Ar}]\,4s^{2}\,3d^{10}\,4p^{4}

[\text{Ar}]\,4s^{2}\,3d^{9}\,4p^{5}

[\text{Ar}]\,4s^{1}\,3d^{10}\,4p^{5}