Question

Which has more electron density pair or double bond chemistry?

Answer 1

Two oxygen atoms must share 2 electrons each to complete each other's shells, making a total of 4 shared electrons. Because twice as many electrons are shared, this is called a 'double covalent bond'. Double bonds are much stronger than single bonds, so the bond length is shorter and the bond energy is higher.

Answer 2

Single bond: It is also called sigma bond, a pair of electrons of the main shell is shared by two atoms. Double bond : It consists of sigma bond and electrons from p orbit(the strength of this electrons when bonded is weaker than sigma bond) also joins in the sharing of electrons between two atoms.