Why do two fluorine atoms bond together?

1 Answer
Mar 7, 2015

Two fluorine atoms bond together to form the fluorine molecule because both those atoms can obtain a full octet by the sharing of two electrons.

Since fluorine is in group 17 of the periodic table, which means it has 7 valence electrons, it only needs one more to complete its octet - 8 electrons in its valence shell.

https://sites.google.com/site/electronconfigurationss/title-for-alba

When two fluorine atoms come together, they each share one of their 7 valence electrons to form a nonpolar covalent bond. A nonpolar covalent bond implies that both electrons that form the bond between the fluorine atoms are shared equally.

http://imgbuddy.com/fluorine-molecule.asp

When electrons are shared equally, they spend the same amount of time on both atoms that form the bond, that is why the fluorine molecule, or #F_2#, is a non-polar molecule.

http://socratic.org/chemistry/intermolecular-bonding/polarity-of-molecules