Question

what is the principal quantum number, n? answer: (1, 2, 3...), n

Explanation:

The principal quantum number \(n\) represents the energy level or shell of an electron in an atom. It takes on positive - integer values starting from 1, i.e., \(n = 1,2,3,\cdots\).

Answer:

\(n = 1,2,3,\cdots\)