58 Ce 140.116
Cerium
lanthanide
Properties
- Atomic number
- 58
- Atomic mass
- 140.116 u
- Category
- lanthanide
- Group
- f-block
- Period
- 6
- Block
- f-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.12 (Pauling)
- Density
- 6.77 g/cm³
- Melting point
- 794.85 °C
- Boiling point
- 3442.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 5d¹ 4f¹
Noble-gas shorthand: [Xe] 4f¹ 5d¹ 6s²
Electrons per shell: 2, 8, 18, 19, 9, 2 — that's 2 in the outermost shell.
About Cerium
Cerium is a chemical element with symbol Ce and atomic number 58. It is a soft, silvery, ductile metal which easily oxidizes in air. Cerium was named after the dwarf planet Ceres (itself named after the Roman goddess of agriculture).
- Discovered by Martin Heinrich Klaproth
- Appearance: silvery white
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.