44 · Ru
Ruthenium
Osann’s 1827 announcement is not upheld. Klaus isolates ruthenium in 1844.
Identity
- Atomic number
- 44
- Symbol
- Ru
- Canonical name
- Ruthenium
- Category
- transition metal
- Group
- 8
- Period
- 5
- Block
- d
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
- 101.072 u
- Electron configuration
- [Kr] 4d7 5s1
- Electrons per shell
- 2, 8, 18, 15, 1
- Standard state
- solid
- Density
- 12.45 g/cm³
- Melting point
- 2,607 K
- Boiling point
- 4,423 K
- Electronegativity
- 2.2 Pauling
- First ionization energy
- 710.2 kJ/mol
- Electron affinity
- 100.96 kJ/mol
History
Unconfirmed announcement
Discovery · rejected · 1827
Osann believes he has found several metals in platinum residues. This announcement is not the upheld discovery of ruthenium.
Ruthenium isolated
Discovery · confirmed · 1844
Klaus isolates ruthenium from Ural platinum residues.
Etymology
- Theme
- country
- Language
- latin
- Root
- Ruthenia
- Meaning
- Ruthenia
Scientists
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