Question

For an atom’s electrons, how many energy sublevels are present in the principal energy level n = 4?



4



9



10



16



32

Answer 1

@arabpride

Answer 2

@Abhisar @Starr_DynastyT @Austin316 @MURP101 @Nnesha @sarahg7 @callielovesyhuu @zepdrix @imqwerty @Rayman @callielovesyhuu

Answer 3

Rules Governing the Allowed Combinations of Quantum Numbers

The three quantum numbers (n, l, and m) that describe an orbital are integers: 0, 1, 2, 3, and so on.
The principal quantum number (n) cannot be zero. The allowed values of n are therefore 1, 2, 3, 4, and so on.
The angular quantum number (l) can be any integer between 0 and n - 1. If n = 3, for example, l can be either 0, 1, or 2.
The magnetic quantum number (m) can be any integer between -l and +l. If l = 2, m can be either -2, -1, 0, +1, or +2.