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Cesium is a solid at room temperature but has a low melting point.
Cesium Sulfide
No, cesium has no odor.
No, cesium is an element.
Cesium doesn't have a smell you need special equipment to detect Cesium.
No cesium is a solid metal.
Cesium is extremely reactive.
cesium will sink
Yes, Cesium cyanide is soluble as are all cesium compounds.
The high reactivity of cesium comes from its tendency to give up the one electron in its outermost shell and become a cesium 1+ ion, which is more stable. In cesium chloride, the cesium is already in its stable ionic form.
Cesium doesn't have a smell you need special equipment to detect Cesium.