Answer:
a double bond is a covalent bond between two atoms involving four bonding electrons as opposed to two in a single bond.
Step-by-step explanation:
In chemistry, a double bond is a covalent bond between two atoms involving four bonding electrons as opposed to two in a single bond. Double bonds occur most commonly between two carbon atoms, for example in alkenes. Many double bonds exist between two different elements: for example, in a carbonyl group between a carbon atom and an oxygen atom. Other common double bonds are found in azo compounds.