Is francium a more reactive metal than potassium?

Best Answer: Francium is a short-lived element but, it's reactivity, even in cold water, is highly explosive and exothermic. It's much more reactive than Potassium or other Alkali metal Elements. As we move down the list of these elements in Group 1 (1A) in the Periodic Table, the more reactive they become. read more

Within the alkali metals family, reactivity increases with increasing atomic number. This makes Francium the most reactive, followed by cesium, rubidium, potassium, sodium and lithium. Francium is almost non-existent in nature so cesium is the most reactive metal of those observed. The reason for the trend of increasing reactivity with increasing atomic number within the alkali metals family has to do with the increasing number of electrons. read more

The alkali metals are in Group 1 of the periodic table, and elements on the left side (and going down) are quite a bit more reactive than those in the middle, where silver is. It turns out that potassium has a lone valence electron, and this element want to loan that electron out in a chemical bond very badly. read more