H (2), HI or HBr has a non-polar covalent bond?

A non-polar covalent bond is a “symmetric” bond. That is, the field between atoms does not appear due to the fact that this bond is formed between two identical atoms, the difference of electronegativity of which is equal to zero. And since it is zero, then, as I said, there will be no polarity. The charge density is distributed evenly over the entire area of ​​atoms. Hence its name.

And the polar one is the complete opposite of the non-polar connection, as the name suggests.

Any simple atoms of the type:

H-H, O-O, N≡N, this also includes all halogens, etc.