Another sort of covalent connection known as a co-ordinate bond is created when an electron pair from one atom is shared.
The same atom provides both shared electrons. It is also known as a dipolar bond or a dative bond.
Each oxygen atom contains 6 electrons in its outermost shell.
The Lewis dot structure of the ozone molecule is as follows since it contains three oxygen atoms: The center oxygen atom makes a double bond with one oxygen atom in this structure but gives two electrons to the other oxygen atom to create a coordinate bond.
