58Ce140.116
Cerium
Lanthanide
Solid at STP
Period 6Block FDiscovered 1803
[Xe]6s2 4f1 5d1
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).
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 58 |
| Atomic Mass | 140.116 u |
| Electron Configuration | [Xe]6s2 4f1 5d1 |
| Oxidation States | +4, +3 |
| Electronegativity | 1.12 (Pauling) |
| Atomic Radius | 235 pm |
| Ionization Energy | 5.539 eV |
| Electron Affinity | 0.5 eV |
| Block | F |
Physical Properties
| Appearance | silvery white |
| Standard State | Solid |
| Melting Point | 1071 K (797.9 °C) |
| Boiling Point | 3697 K (3423.8 °C) |
| Density | 6.77 g/cm³ |
| Molar Heat | 26.94 J/(mol·K) |
| CPK Color | #FFFFC7 |
Classification
| Category | Lanthanide |
| Group Block | Lanthanide |
| Period | 6 |
| Block | F |
Discovery
| Year Discovered | 1803 |
| Discovered By | Martin Heinrich Klaproth |
| Electron Shells | 2, 8, 18, 19, 9, 2 |