A nonpolar covalent bond shows that: the electronegativities of the two atoms (of the same element) in a nonpolar covalent bond are equal.
Covalent bonds form between atoms (usually nonmetals) that share pairs of valence electrons. Nonpolar molecules are molecules that share charges evenly. Nonpolar molecules don’t react to electrostatic charges. For example, covalent molecules like Hydrogen gas (H2) or oxygen (O2) are made of one type of atom. Their bonds result in no electronegativity. Nonpolar covalent bonds have no difference in electronegativity. It is nonpolar because they share the pair of electrons evenly. Covalent molecules made of only one type of atom, like hydrogen gas (H2) or oxygen (O2) are nonpolar and their electronegativities equal because the atoms share their electron pair equally.