The allegory not only draws on the theory of forms, but it is connected both to the concept of forms and Plato's theory of the stages of life. 1  At the lowest stage, the cognitive stage of imagination (in Greek, eikasia), the prisoners exist bound and hindered in their perspective.
Since any orbital can hold a maximum of two electrons, the bonding orbital in H 2 + is only half-full. This single electron is nevertheless enough to lower the potential energy of one mole of hydrogen nuclei pairs by 270 kJ quite enough to make them stick together and behave like a distinct molecular species.
Electrons orbit the nucleus in energy levels, which are also called shells. These energy levels contain sub-shells, or orbitals, each of which holds a certain number of electrons. By looking at the electron configuration for titanium, it is possible to determine how its electrons are arranged. There are two electrons in the s orbital of the first energy level. The second level contains eight electrons, with two in the s orbital and six in the p orbital.