rubidium

Also known as Rb, element 37, 37Rb

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. Rubidium is the first alkali metal in the group to have a density higher than water. On Earth, natural rubidium comprises two isotopes: 72% is a stable isotope Rb, and 28% is slightly radioactive Rb, with a half-life of 48.8 billion years – more than three times as long as the estimated age of the universe.

AI overview

Rubidium is a soft, silvery-grey metal that belongs to the alkali metal group and is notable for being the first alkali metal denser than water. It occurs naturally in two forms on Earth: one stable form and one very slightly radioactive form with an extremely long half-life of nearly 49 billion years.

AI-generated from the Wikipedia summary — may contain errors.

Chemical data

Formula: Rb
Molecular weight: 85.468 g/mol
IUPAC name: rubidium
SMILES: [Rb]
InChIKey: IGLNJRXAVVLDKE-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

9,055 papers

Rubidium: overview and clinical perspectives.ReviewModern problems of pharmacopsychiatry · 1982Fieve RR, Jamison KRDOI: 10.1159/000406241
Rubidium Chloride Increases Life Span Through an AMPK/FOXO-Dependent Pathway in Caenorhabditis elegans.The journals of gerontology. Series A, Biological sciences and medical sciences · 2022Hao M, Zhang Z, Guo Y et al.DOI: 10.1093/gerona/glab329
Striving to improve (82)Rubidium PET MPI accuracy.Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology · 2019Rimoldi ODOI: 10.1007/s12350-018-1419-0
Rubidium, salami and depression. You cannot have everything in life.Blood purification · 2008Canavese C, Decostanzi E, Bergamo D et al.DOI: 10.1159/000129657
Amniotic fluid rubidium concentration association with newborn birthweight: a maternal-neonatal pilot study.American journal of obstetrics & gynecology MFM · 2023Ovadia YS, Dror I, Liberty G et al.DOI: 10.1016/j.ajogmf.2023.101149
Blood rubidium level in patients with major affective disorders.ReviewGeneral pharmacology · 1987Malek-Ahmadi P, Adams MKDOI: 10.1016/0306-3623(87)90001-2
[New vistas on rubidium].ReviewL'Encephale · 1977
Rubidium: a companion of potassium or an essential trace element of its own?ReviewBeitrage zur Infusionstherapie = Contributions to infusion therapy · 1991Selin E, Teeyasoontranont V

via PubMed

Wikidata facts

Mass: 85.4678
Image: RbMetal.JPG

Show 13 more facts

atomic number: 37
element symbol: Rb
Commons category: Rubidium
time of discovery or invention: 1861-00-00
Commons gallery: Rubidium
electronegativity: 1
canonical SMILES: [Rb]
chemical formula: Rb
standard molar entropy: 69.5
Unicode character: 銣
ionic radius: 1.72
electron configuration: [Kr] 5s¹
oxidation state: 1

Sources (7)

via Wikidata · CC0

~16 min read

Article

13 sections

Contents

Characteristics
Physical properties
Chemical properties
Compounds
Isotopes
Occurrence
Production
History
Applications
Precautions and biological effects
References
Further reading
External links

German chemists Robert Bunsen and Gustav Kirchhoff discovered rubidium in 1861 by the newly developed technique, flame spectroscopy. The name comes from the Latin word , meaning deep red, the color of its emission spectrum. Rubidium's compounds have various chemical and electronic applications. Rubidium metal is easily vaporized and has a convenient spectral absorption range, making it a frequent target for laser manipulation of atoms. Rubidium is not a known nutrient for any living organisms. However, rubidium ions have similar properties and the same charge as potassium ions, and are actively taken up and treated by animal cells in similar ways.