can a covalent bond be between two identical atoms or no?

can a covalent bond be between two identical atoms or no?


99.9% sure, yes. Example: O2

I think it actually HAS to be a covalent bond, because there is no electronegativity difference.

I think it actually HAS to be a covalent bond, because there is no electronegativity difference.

quite right, two atoms of same electronegs.

i think difference of greater than two, then ionic, about 1-2, then covalent (which includes polar covalent as approaching diff. of 2, and stricktly covalent for 0 difference.

for example, HCl is polar covalent

and NaCl is completely ionic

O2, Cl2 and all alther diatomic molecules: covalent

am i right? i'm not too sure about the above, so please correct me if i'm wrong.

thanks guys, you're all right, the answer of the problem and the explanation of the problem of the test i took contradicted themselves