What is stability in an atom?

Democritus was the person who found out that an atom cant be divided into anything smaller. Atoms are eternal and unchanging but the relationship between them is constantly changing. Atoms stabilize themselves by giving off and taking electrons. Molecules achieve maximum stability when electrons are shared between nuclei. Atoms achieve maximum stability when their electrons go in the rings of the lowest possible energies. The atom is most stable when there are 2 electrons in the first energy level, 8 in the second and so on and so fourth. Sometimes they share electrons to become stable. One atom gives away some electrons and another one gains them. The atom will be completely stable in the state with the smallest orbit. If there is an orbit of a lower energy the electron then can jump. If an electron jumps one orbit closer to the nucleus, it emits photons that moves away at the speed of light and lets out energy equal to the difference of the energy of the two orbits. This jump between the two energy levels is called a quantum jump. Each energy level has a certain amount of electrons that it can hold. These energy levels orbit around the nucleus. The first energy level can hold two electrons the second can hold eight the third can hold eighteen and the fourth can hold thirty two.