Wave functions describe orbitals in a hydrogen atom. Each function is characterized by 3 quantum numbers: n, l, and ml.If the value of n = 4:... The quantum number l can have values from to .... The total number of orbitals possible at the n = 4 energy level is .If the value of l = 2:... The quantum number ml can have values from to .... The total number of orbitals possible at the l = 2 sublevel is .