What occurs as two atoms of fluorine combine to become a molecule of fluorine?

When two fluorine atoms combine, they become more stable, and form a molecule called ${F}_{2}$. When referring to fluorine itself, ${F}_{2}$ is usually used, as fluorine never exists alone due to its reactivity.
Since the bonding of ${F}_{2}$ is between two same elements, which are non-metals, non-polar covalent bonding occurs. Here is a diagram of the molecule: