[AlwaysQuestioning]

Hi guys. Since fluorine is the most reactive element in the periodic table, i'm wondering why isn't something like cesium more reactive than it since both have to gain／lose one electron, does it take less energy for the fluorine to gain one valence electron(given that its nucleus can "attract" the valence electron from the other atom) than for let's say an alkali metal to loose an electron?
What are the energy levels involved? (kj/mol)


Thanks!!!! (sorry if i sound too dumb)

[Borek]

It is difficult to compare reactivity of so different elements and state "this one is more reactive".

You should be easily able to google values for ionization energy and electron affinity for both elements.