58 · Ce
Cerium
Identified in 1803, independently, by Berzelius and Hisinger and by Klaproth.
Identity
- Atomic number
- 58
- Symbol
- Ce
- Canonical name
- Cerium
- Category
- lanthanide
- Group
- unassigned
- Period
- 6
- Block
- f
Series set apart from the main table. Whether group 3 is lanthanum or lutetium (actinium or lawrencium) is still discussed, so the group is left empty.
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
- 140.1161 u
- Electron configuration
- [Xe] 4f1 5d1 6s2
- Electrons per shell
- 2, 8, 18, 19, 9, 2
- Standard state
- solid
- Density
- 6.77 g/cm³
- Melting point
- 1,068 K
- Boiling point
- 3,716 K
- Electronegativity
- 1.12 Pauling
- First ionization energy
- 534.4 kJ/mol
- Electron affinity
- 55 kJ/mol
History
Ceria in Sweden
Discovery · jointly credited · 1803
Berzelius and Hisinger identify a new earth in a Bastnäs ore.
Independent work
Discovery · jointly credited · 1803
Klaproth identifies the same earth the same year.
Etymology
- Theme
- celestial body
- Language
- latin
- Root
- Ceres
- Meaning
- the dwarf planet Ceres
Scientists
Places and institutions
- Stockholm — historical setting : Sweden — present country : Sweden
- Berlin — historical setting : Prussia, 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