One use of cesium is in atomic clocks.
Cesium Sulfide
No, cesium is an element.
Cesium doesn't have a smell you need special equipment to detect Cesium.
cesium will sink
Yes, Cesium cyanide is soluble as are all cesium compounds.
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Yes
Yes
Yes
Yes
The element that is used in Cesium. Usually it will come in the form of Cesium 133 because this is the most easily used form.
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.