∞ generated and posted on 2016.08.25 ∞
Electrons shared between or otherwise attracted by two or more atoms.
Chemical bonds hold atoms together within molecules as well as within salts. They differ in terms of the degree to which the electrons are shared between the atoms involved.
The degree of sharing ranges from equally (as seen between two "like" atoms, a.k.a., nonpolar covalent bonds) to unequally. The latter can be to the point where one atom has completely donated an electron to another atom (ionic bond).
In between are polar covalent bonds where electrons are shared but unequally so. In addition are weaker bonds such as hydrogen bonds, which basically are attractions between oppositely charged entities.
Note that the more that electrons are shared within chemical bonds, forming nonpolar covalent bonds, then generally the greater the amount of potential energy available in those bonds. C-H bonds, that is, carbon-to-hydrogen, notably are important , nonpolar covalent bonds found throughout .