Question

What substance has nonpolar covalent bonds?

Answer 1

Hint: If the elements in the molecule or compound have no difference or very little difference in the electronegativity of the elements is known as a nonpolar molecule or compound. If a bond is formed between two atoms and both the atoms are non-metals then it is a covalent bond.

Complete answer:
We know that when the elements combine to form a molecule then the elements are joined together using a bond, and this bond is three types, i.e., ionic, covalent, and coordinate bonds. This classification is based on the type of atoms combined to form a bond.
If a bond is formed between two atoms and both the atoms are non-metals then it is a covalent bond and non-metals are placed on the right side of the periodic table.
If the elements in the molecule or compound have no difference or very little difference in the electronegativity of the elements is known as a nonpolar molecule or compound.
So, the non-polar covalent bonds are found in homonuclear compounds like $C{l}_2$, $O_2$, $N_2$, etc. The electrons forming the covalent bond in these compounds are exactly between the molecules, i.e., it is not shifted towards any one element, and there is a symmetry in the electron cloud of these molecules or compounds.
So, an important characteristic of non-polar covalent is that the electron cloud is symmetrical and there is no charge separation.

Note:
There is another type of covalent, i.e., polar covalent, and this bond is formed between the elements in which there is a difference in their electronegativity but all the atoms are non-metals.