What would be the result when fluorine reacts with cesium?

Caesium fluoride would be produced: Cs + ½F₂ → CsF. This reaction is strongly exothermic (ΔH = −554.67kJ/mol)[1]. Because this is an expensive way of making caesium fluoride, certainly compared to the reaction CsOH + HF → CsF + H₂O, it's not often done. However, a video of the reaction is here:. read more

Reactivity is a result of outer electrons orbiting around a nucleus. Long story short: When an element is really small and has its electrons close to the nucleus and it's only missing one electron to make it very stable, it will want more electrons from other elements (this is Fluorine). Wanting more electrons is called electronegativity. read more