92U238.0289
Uranium
Actinide
Solid at STP
Period 7Block FDiscovered 1789
[Rn]7s2 5f3 6d1
Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-white metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 92 |
| Atomic Mass | 238.0289 u |
| Electron Configuration | [Rn]7s2 5f3 6d1 |
| Oxidation States | +6, +5, +4, +3 |
| Electronegativity | 1.38 (Pauling) |
| Atomic Radius | 240 pm |
| Ionization Energy | 6.194 eV |
| Block | F |
Physical Properties
| Standard State | Solid |
| Melting Point | 1408 K (1134.8 °C) |
| Boiling Point | 4404 K (4130.9 °C) |
| Density | 18.95 g/cm³ |
| Molar Heat | 27.665 J/(mol·K) |
| CPK Color | #008FFF |
Classification
| Category | Actinide |
| Group Block | Actinide |
| Period | 7 |
| Block | F |
Discovery
| Year Discovered | 1789 |
| Discovered By | Martin Heinrich Klaproth |
| Electron Shells | 2, 8, 18, 32, 21, 9, 2 |