45 · Rh
Rhodium
Isolated by Wollaston in 1804.
Identity
- Atomic number
- 45
- Symbol
- Rh
- Canonical name
- Rhodium
- Category
- transition metal
- Group
- 9
- 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
- 102.905502 u
- Electron configuration
- [Kr] 4d8 5s1
- Electrons per shell
- 2, 8, 18, 16, 1
- Standard state
- solid
- Density
- 12.41 g/cm³
- Melting point
- 2,237 K
- Boiling point
- 3,968 K
- Electronegativity
- 2.28 Pauling
- First ionization energy
- 719.7 kJ/mol
- Electron affinity
- 110.27 kJ/mol
Notable isotopes
This summary is not an inventory of every isotope.
- Rh-103 · 100 % · stable
History
Rhodium from platinum ores
Discovery · confirmed · 1804
Wollaston separates rhodium after his work on palladium.
Etymology
- Theme
- color
- Language
- grec
- Root
- rhodon
- Meaning
- rose
Scientists
Places and institutions
- London — historical setting : United Kingdom — present country : United Kingdom
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