sentence: Covalent bonds form when atoms share electrons.
sentences_before: When two or more atoms are in a chemical bond they stay joined unless the needed amount of energy or more is transferred to the bond. Something different can then happen. Chemical bonds can be explained using different theories. Some of these theories try to explain chemical bonds in a simple way that can be used by chemists to imagine what could happen when they try to make molecules. Some explain how the atoms are bonded together with more detail and are used by chemists and physicists.
sentences_after: Ionic bonding is the attraction between oppositely charged ions.
concept_name: covalent bond
headings: Chemical bond
categories: Chemistry Energy