Because we have many different shells, we have many different subshells and we have made different orbitals within our subshells. So. Luckily, nature always tends to form the lowest possible energy state. Therefore, whenever we add electrons to our atom, that electron will go into the lowest possible subshell. Lowest possible energy subshell. So let's examine the following concepts, and I state the following as electrons move further from the nucleus, our energy level will increase.