# An oxygen molecule contains a double bond because the two atoms of oxygen share a total of how many electrons?

$\text{A total of FOUR electrons.......}$
A covalent bond is conceived to result from the sharing of two electrons between 2 positively charged atomic nuclei. A $\sigma$ bond results where the electron density is precisely between the nuclei. Where the electrons occupy a plane above and below the atom-atom vector, a $\pi$ bond results.