Answer:
Option a. 2
Step-by-step explanation:
Thinking process:
The electron configuration of an atom always ensures that the lowest level orbital is filled first. The orbitals come in the different sizes and shapes. The first energy levels are made of the s orbitals. These hold two electrons. Next, the p orbitals hold 8 electrons. These are made of the s and p orbital. Then, the next level holds 18 electrons made up of the s, p, and d orbitals. Finally, the next level hold 32 electrons made up of s, p, d, and f orbitals.