The order of increasing principal energy levels in an atom is related to which of the following sequences?
A)1-2-3-4
B)1-3-5-7
C)4-3-2-1
D)s-p-d-f
E)f-d-p-s

Question

Quizplus · Accepted Answer

The principal energy levels in an atom are designated by the quantum number n, which can take on positive integer values. The order of increasing principal energy levels is therefore 1-2-3-4.

The Order of Increasing Principal Energy Levels in an Atom