Supposing you mean cesium, I would say no. You see, when francium and water are mixed they react much more violently than cesium in water, causing a greater explosion. Therefore, cesium would combine more rapidly.
Cesium is a solid at room temperature but has a low melting point.
Cesium Sulfide
No, cesium is an element.
Cesium is a reactive soft metal that has a "valency" of 1 and forms ionic compounds. It is in group 1, the alkali metals
5g would remain
I suppose that you think to the radioactive isotope Cs-17; After 4 years remain 9,122 g.
2 1/2 g
2 1/2 g
2 1/2 g
2 1/2 g
2 1/2 g
As you did not specify an isotope of cesium, I will assume you meant natural cesium. Natural cesium is not radioactive so it does not decay. There will always be the same 10 g of cesium, no matter how long you wait.
You must know the half life of Caesium to calculate this.
1 1/4 g (apex)or 1.25 g
Since the half-life of cesium-137 is about 30 years, 3 half-lives would have passed in 90 years. The first half-life would leave .5 mg of cesium-137. The second would leave .25 mg, and the third half-life would leave .175 mg of cesium-137.
Cesium costs about $30/G