Which of the following sets of numbers could be used to designate the principal energy levels (shells) in an atom?
A) -1, 0, 1, 2, and 3
B) 0, 1, 2, 3, and 4
C) 1, 2, 3, 4, and 5
D) all of these

Question

Quizplus · Accepted Answer

Principal energy levels in an atom are designated by positive integers starting from 1 (n=1, 2, 3, ...). Therefore, option C (1, 2, 3, 4, and 5) correctly represents possible principal energy levels.

Which of the Following Sets of Numbers Could Be Used