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Question
How many orbitals are possible for n = 4?
Solution
When n = 4, l = 0, 1, 2 and 3.
Hence, there are four subshells namely, s, p, d and f
l = 0, m1 = 0; one 4s orbital.
l = 1, m = –1, 0, +1; three 4p orbitals.
l = 2, m1 = –2, –1, 0, +1, +2; five 4d orbitals.
l = 3, m1 = –3, –2, –1, 0, 1, 2, 3; seven 4f orbitals.
Hence, the number of possible orbitals when n = 4 are sixteen.
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