Question

What does a nonpolar covalent bond show about the electronegativities of its two atoms?

Answer 1

that they will always have the same electronegativity so electronegativity is zero so for sure non polar covalent ONLY occur between the same elements

for example oxygen bonded to oxygen will result in zero electronegativity

Answer 2

Answer: The electronegativities of the atoms in a non-polar covalent bond is equal.

Explanation:

A non-polar covalent bond is defined as the bond which is formed between the atoms having no difference in electronegativity between the atoms forming a bond. Thus, the two atoms have the same value of electronegativity. For Example: $H_2,O_2$ etc...

A polar covalent bond is defined as the bond which is formed between the atoms having some difference in electronegativity between the atoms forming a bond. Thus, the two atoms have different value of electronegativity. For Example: $HCl, H_2O$ etc...

Hence, the electronegativities of the atoms in a non-polar covalent bond is equal.