Question

what types of atomic orbitals are in the third principal energy level?
s and p only
s, p, d, and f
s, p, and d only
p and d only

Explanation:

The principal energy level \(n\) determines the types of orbitals. For \(n = 3\), the angular momentum quantum number \(l\) can have values \(l=0\) (s - orbital), \(l = 1\) (p - orbital), and \(l=2\) (d - orbital). The f - orbitals (\(l = 3\)) start to appear from \(n=4\).

Answer:

s, p, and d only