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Rubidium is a chemical element; it has symbol Rb and atomic number 37. It is a very soft, whitish-grey solid in the alkali metal group, similar to potassium and caesium. [9] Rubidium is the first alkali metal in the group to have a density higher than water.
Like other alkali metal oxides, Rb 2 O is a strong base. Thus, Rb 2 O reacts exothermically with water to form rubidium hydroxide. Rb 2 O + H 2 O → 2 RbOH. So reactive is Rb 2 O toward water that it is considered hygroscopic. Upon heating, Rb 2 O reacts with hydrogen to rubidium hydroxide and rubidium hydride: [2] Rb 2 O + H 2 → RbOH + RbH
The chemical elements can be broadly divided into metals, metalloids, and nonmetals according to their shared physical and chemical properties.All elemental metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metallic elements; and have at least one basic oxide.
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Rubidium sulfide is an inorganic compound and a salt with the chemical formula Rb 2 S. It is a white solid with similar properties to other alkali metal sulfides . Production
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Other than 87 Rb, the longest-lived radioisotopes are 83 Rb with a half-life of 86.2 days, 84 Rb with a half-life of 33.1 days, and 86 Rb with a half-life of 18.642 days. All other radioisotopes have half-lives less than a day. 82 Rb is used in some cardiac positron emission tomography scans to assess myocardial perfusion. It has a half-life of ...
Rubidium hydroxide is the inorganic compound with the formula RbOH. It consists of rubidium cations and an equal number of hydroxide anions. It is a colorless solid that is commercially available as aqueous solutions from a few suppliers. Like other strong bases, rubidium hydroxide is highly caustic. Rubidium hydroxide is formed when rubidium ...