Despite the fact that you could look it up that cesium is indeed more reactive than potassium, you could also take into account the periodic trends. One of these trends is that metals tend to be more reactive as you proceed down a group/family and as you move to the left of the table. Since both cesium and sodium are members of the alkali metals, cesium should be more reactive of the two.
more reactive
Chlorine, a more reactive halogen would displace iodide in its hallide solution. Potassium chloride would be formed.
Because all four of those elements are Alkali Metals (first family on the periodic table)
Caesium is the 5th element in group I of the periodic table. It is an alkali metal, and they become more reactive as you go down the group from lithium to sodium to potassium etc. So we would expect that caesium is highly reactive, even more reactive than rubidium.
ionic; it would donate one electron and carry a positive charge
more reactive
Cesium. Cesium is the bad boy of the alkali metals, a period that's just jam-packed with seriously nasty elements. Cesium is reactive enough that if you were to put some water into dry ice, and wait till the ice got that cold itself before putting some cesium on it, the cesium would still react with it! Here's a remembrance: the higher an alkali metal's atomic number, the more reactive it is.
Francium and cesium, the two with the highest atomic numbers.
The 2nd most reactive is Cesium after Francium. If you disregard Francium because it is radioactive, then it would be Rubidium after Cesium.
the alkali metals are the most reactive... either cesium or francium would be the most reactive out of this group.
They all react, but Cesium would be the most reactive, since francium is radioactive we don't consider francium the most reactive.
Hydrogen, lithium, sodium, potassium, rubidium, cesium and francium are the elements located in group 1 of the periodic table.
Cesium is a reactive soft metal that has a "valency" of 1 and forms ionic compounds. It is in group 1, the alkali metals
silicon
silicon
silicon
Potassium is too reactive to mix with acid