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.
The shell closest to the nucleus, the K shell, has a capacity for two electrons. The next shell, L, has a capacity for eight, and the third shell, M, holds up to 18. The atomic number for nitrogen is seven, which means it has seven protons and seven electrons in the atom. Two electrons are in the innermost K shell. The remaining five electrons go in the nitrogen atom's valence shell. Learn more about Chemistry