Rubidium is a silvery-white and very soft metal — and one of the most highly reactive elements on the periodic table. Rubidium has a density about one and a half times that of water and is solid at ...

Robert Bunsen and Gustav Kirchhoff discovered the element Rubidium in 1861 with the help of a spectroscope while analyzing a mineral called lepidolite. When the mineral was heated, Bunsen and ...

China has achieved a technological breakthrough in the production of rubidium, the South China Morning Post has reported, as Beijing looks to expand its dominance in the critical minerals supply chain ...