An atom in its ground state contains 33 electrons. how many of these electrons are in p orbitals?

The selection rules allow finding how many electrons there are in the p orbitals is:

Solving the equation for atoms in three dimensions gives three constants called quantum numbers, which are related:

These relationships are called selection rules.

They indicate that the atom has 33 electrons, therefore they must be arranged according to the selection rules.

   1s² 2s²p⁶ 3s² 3p⁶ 4s² 3d10 4p³

Electrons in p orbitals are:

 quantum number    electrons

   principal                   p orbital

          1                             0

          2                            6

          3                            6

          4                            3

Total electrons             15

In conclusion using the selection rules we can find when electrons are in the p orbitals is:

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