* Electronegativity: Fluorine is the most electronegative element on the periodic table. This means it has a strong tendency to attract electrons towards itself.
* Electron Configuration: Fluorine has 9 electrons, with 7 in its outermost shell. It needs one more electron to achieve a stable octet (8 electrons in the outermost shell).
* Ionization Energy: Fluorine has a very high ionization energy, meaning it requires a lot of energy to remove an electron.
Therefore, it's much easier for fluorine to gain an electron and form a negative ion (F-) than to lose an electron and form a positive ion.
