Which of the following is NOT a type of atomic orbital?

The atomic orbitals are regions in an atom where there is a high probability of finding electrons, and they are categorized based on their shapes and the energy levels they represent. The types of atomic orbitals include:

• The s orbitals, which are spherical in shape and can hold a maximum of two electrons.

• The p orbitals, which are dumbbell-shaped and can accommodate up to six electrons, found in three different orientations (px, py, pz).

• The d orbitals, which have more complex shapes and can hold a total of ten electrons across five different orientations.

The g orbitals, while theorized in quantum mechanics, do not exist in the ground state configurations of known atoms. They come into play at higher energy levels beyond the prevalent d orbitals, specifically starting from the seventh principal energy level. Since g orbitals are not part of the standard atomic orbitals found in the electrons of atoms commonly studied in chemistry, this makes the g designation the correct answer to the question regarding which is NOT a type of atomic orbital typically encountered.