It is actually a diagrammatic representation that will describe the bonding of the atoms.
It may also define the number of lone pairs of electrons that will exist in a molecule of atoms.
It is also known as the Lewis dot structure.
So in the electron dot structure of , there is not any difference in the electronegativities of the fluorine atom and so will form a covalent bond by the sharing of electrons.
In the fluorine atom, there is the presence of the 7 valence electrons, so it will get stabilized by the sharing of one electron each.