What is the difference between oxygen and oxide?

Oxygen	Oxide
Oxygen is the molecule that is present in the periodic table.	Oxide is the negative ion of oxygen that is individually not present in the periodic table.
Oxygen is a molecule, in which 2 atoms are covalently bonded.	Oxide is a singular oxygen atom, in which 2 electrons are added, thus making it an anion.
The atomic number of oxygen is 8 and the electronic configuration is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^4$.	The electronic configuration of oxide is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6$.
The oxygen is represented as ${\mathrm{O}}_2$.	The oxide is represented as ${\mathrm{O}}^{2-}$.