* Electronegativity: Fluorine has the highest electronegativity of all elements. This means it has a strong attraction for electrons, making it highly reactive. Arsenic has a much lower electronegativity.
* Electron Configuration: Fluorine only needs one more electron to complete its outer shell, making it highly eager to gain an electron and form a bond. Arsenic has multiple electrons in its outer shell, making it less reactive.
* Bond Strength: Fluorine forms very strong bonds due to its small size and high electronegativity. Arsenic bonds are weaker.
In summary, fluorine's high electronegativity, strong electron affinity, and ability to form strong bonds make it a much more reactive element than arsenic.
