Francium hasn't applications.
Caesium applications:
- drilling fluids
- atomic clocks
- centrifugation fluids
- electronics
- catalyst
- gamma emitter (Cs-137)
etc.
Francium is similar to cesium.
Yes, the atomic size of francium is greater than that of cesium. Francium is located below cesium in the same group on the periodic table, so as you move down the group, atomic size generally increases.
Francium would combine with water more readily than cesium. Francium is the most reactive alkali metal due to its position in the periodic table, so it would react more violently with water compared to cesium.
Because the atom of francium is a whole row down from cesium. You see more YouTube videos of cesium in water because francium is highly radioactive, so it would be very hard to obtain a sample of francium to throw into water.
The 2nd most reactive is Cesium after Francium. If you disregard Francium because it is radioactive, then it would be Rubidium after Cesium.
Francium has the largest atomic radius among rubidium, cesium, and francium, as atomic radius generally increases down a group in the periodic table.
Francium.
radium francium and cesium
Although francium is very electropositive, cesium is typically considered more electropositive. This is because francium is rare and highly radioactive, making it difficult to study and utilize for practical purposes. Additionally, the large size of the francium atom leads to some electron shielding, decreasing its electropositivity compared to smaller atoms like cesium.
Francium is more reactive than cesium. This is due to francium's position in the periodic table, where elements at the bottom of a group tend to be more reactive than those at the top. Francium is the most reactive metal because of its large atomic size and low ionization energy.
Francium and cesium
Probable francium would react more violent.