The number of orbitals in each principle energy level (n) equals​

In the n=1 shell you only find s orbitals, in the n=2 shell, you have s and p orbitals, in the n=3 shell, you have s, p and d orbitals and in the n=4 up shells you find all four types of orbitals.

Explanation:

There are n2 orbitals for each energy level. For n = 1, there is 12 or one orbital.

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explanation: