Possible values of the principal quantum number n for an electron in an atom are:
A)only 0 and 1
B)only 0,1,2,..., $\infty$
C)only 0,1,..., -1
D)only 1/2 and -1/2
E)only 1,2,3,..., $\infty$

Question

Possible values of the principal quantum number n for an electron in an atom are:
A)only 0 and 1 
B)only 0,1,2,..., $\infty$ 
C)only 0,1,..., -1 
D)only 1/2 and -1/2 
E)only 1,2,3,..., $\infty$

Quizplus · Accepted Answer

The principal quantum number n for an electron in an atom can only take positive integer values starting from 1, 2, 3, ..., to infinity. This defines the size and energy level of the electron's orbit.

Possible Values of the Principal Quantum Number N for an Electron