37 · Rb
Rubidium
Discovered by Bunsen and Kirchhoff in 1861.
Identity
- Atomic number
- 37
- Symbol
- Rb
- Canonical name
- Rubidium
- Category
- alkali metal
- Group
- 1
- Period
- 5
- Block
- s
Properties
These quantities come from the Periodic Table JSON compilation. They have not yet been checked, one by one, against CIAAW atomic weights or NIST measurements. A value marked estimated is not a measurement.
- Atomic mass
- 85.46783 u
- Electron configuration
- [Kr] 5s1
- Electrons per shell
- 2, 8, 18, 8, 1
- Standard state
- solid
- Density
- 1.532 g/cm³
- Melting point
- 312.45 K
- Boiling point
- 961 K
- Electronegativity
- 0.82 Pauling
- First ionization energy
- 403 kJ/mol
- Electron affinity
- 46.884 kJ/mol
History
Red lines
Discovery · jointly credited · 1861
Bunsen and Kirchhoff discover rubidium by spectroscopy in lepidolite.
Etymology
- Theme
- color
- Language
- latin
- Root
- rubidus
- Meaning
- deep red
Scientists
Places and institutions
- Heidelberg — historical setting : Grand Duchy of Baden, then Germany — present country : Germany
See also
Sources
- IUPAC, Periodic Table of the Elements
- Bowserinator, Periodic Table JSON. Compilation secondaire d’où viennent les grandeurs physiques importées (masse, densité, températures, énergies). Elles ne sont pas revérifiées une à une auprès du NIST ou de la CIAAW.
- John Emsley, Nature’s Building Blocks: An A–Z Guide to the Elements