Final answer:
The correct answer for the types of orbitals in the principal energy level n = 3 is B. s, p, d. These include one s orbital, three p orbitals, and five d orbitals.
Step-by-step explanation:
The correct answer to which types of orbitals are found in the principal energy level n = 3 is B. s, p, d.
At the third principal energy level, there are one s orbital, three p orbitals, and five d orbitals. The s orbital is spherical, the p orbitals have dum_bell shapes, and the d orbitals have more complex geometries.
Each type of orbital can contain a certain number of electrons: s orbitals can hold 2 electrons, p orbitals can hold 6 electrons (2 per orbital), and d orbitals can hold 10 electrons (2 per orbital). As a result, the third energy level can hold up to 18 electrons in total.
This information is reflected in the orbital filling order and electron configuration principles detailed in atomic structure and quantum mechanics.