The term chemical bond is used to refer to the union that exists between two atoms (which can be the same or different) in order to form a molecule. The atoms are composed of an atomic nucleus and yet are surrounded by electrons (which have negative electric charge). In a chemical bond there is the participation between the electrons that make up the atoms that are intertwining, because it is through them that the bonds are united, in chemical terms it is said that it is a transfer of electrons between atoms, the phenomenon that occurs in a chemical bond.
In the world in which we live, only noble gases and metals in a vapor state are naturally present as isolated atoms, that is, single atoms, which do not join to create a molecule, so it can be said that most of the Elements that exist are formed by chemical bonds, which are formed in order to achieve chemical stability. The bonds are formed as a consequence of the movement that exists between the valence electrons of an atom, which are the electrons that are in the outermost shell, that is, those of the last energy level, in most cases the goal is to have eight electrons in this last cloud in order to be stable (which for them translates into resembling the closest noble gas as possible, trying to copy its structure).
Because the nature of each atom is different, there are also different types of chemical bonds, which are: ionic bond, this type of bond is about giving or receiving electrons, it can be one or more. When the electrons are transferred, the atom is positively charged (called ion cation) and when receiving electrons the atom has a greater negative charge (it is called anion ion), in this type of bond the phenomenon occursthat ions with opposite charges attract each other. On the other hand, there is the covalent bond, which occurs when the atoms share electrons with each other and the electronegativity difference between them is minimal, and the metallic bonds, and the bonds through hydrogen bonds.
