78 · Pt
Platinum
Worked in South America before any single year. Described in Europe by Ulloa in 1735.
Identity
- Atomic number
- 78
- Symbol
- Pt
- Canonical name
- Platinum
- Category
- transition metal
- Group
- 10
- Period
- 6
- 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
- 195.0849 u
- Electron configuration
- [Xe] 4f14 5d9 6s1
- Electrons per shell
- 2, 8, 18, 32, 17, 1
- Standard state
- solid
- Density
- 21.45 g/cm³
- Melting point
- 2,041.4 K
- Boiling point
- 4,098 K
- Electronegativity
- 2.28 Pauling
- First ionization energy
- 870 kJ/mol
- Electron affinity
- 205.041 kJ/mol
History
Known before a single date
Platinum was worked in South America before its European description. This is not an Old World ancient discovery, and no single year is assigned.
European description
Observation · confirmed · 1735
Ulloa describes the platinum of the Chocó. That account does not create the pre-colonial use of the metal, which still has no single year.
Etymology
- Theme
- mineral
- Language
- espagnol
- Root
- platina
- Meaning
- little silver
Scientists
Places and institutions
- Chocó — historical setting : New Granada — present country : Colombia Pre-colonial gold working and the European description of platinum. The modern country does not replace New Granada.
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