Why do chemical bonds form? What basic forces are involved

Step-by-step solution Step 1 of 1 Atoms tend to form bonds because, as their electronic configuration is incomplete, they have a high Energy value. Only noble gases have a stable configuration, thus a low Energy value. When to atoms form a bond, the overall energy is the sum of both repulsion energy and attraction energy. Two atoms are attracted one to another because of the attraction of opposite charges, in fact electrons (negative charges) of one atom are attracted by the nucleus (that has a positive charge) of the other atom and vice-versa. At the same time, the nuclei of each atom repel one from another because we know that charges having the same sign tend to repel each other. Every interaction, attractive and repulsive, has an Energy values, if these values lead to an overall reduction of energy cause formation of bonds.