Which of the following ground state configurations matches represents an atom with 7 valence electrons?

Question

Quizplus · Accepted Answer

Option D represents an atom with 7 valence electrons, which corresponds to the electron configuration of a halogen (group 17 element) in the periodic table. The configuration ends in 3p^5, indicating 5 electrons in the p orbital of the third energy level, plus the 2 in the s orbital, totaling 7 valence electrons.

Which of the Following Ground State Configurations Matches Represents an Atom