rubidium
Rubidium is a chemical element, symbol Rb, atomic number 37. Rubidium is germplasm soft, silver-white metal, belonging to alkali metal, atomic weight of 85.4678. Simple rubidium reactivity is very high, its nature and other alkali metal similar, for example, will be rapid oxidation in the air. The naturally occurring rubidium element consists of two isotopes: 85Rb is the only stable isotope, 72%; 87Rb is micro-radioactive, accounting for 28%, its half-life of 49 billion years, more than three times the age of the universe. German chemist Robert William Bentley and Gustav Kilhoff discovered the rubidium element in 1861 using the new technology Flame Spectrum. Rubidium compounds have some chemical and electronic applications. Rubidium metal can easily gasification, and it has a special absorption spectrum range, it is often used in atomic laser control technology. Rubidium has no known biological function. However, the mechanism of treatment of rubidium ions by organisms is similar to that of potassium ions, so rubidium ions are actively transported into plants and animal cells. ...