92U238.03
Uranium
Actinide · element 92 · f-block (shown below the main table)
Quick facts
| Symbol | U |
|---|---|
| Atomic number | 92 |
| Relative atomic mass | 238.03 |
| Category | Actinide |
| Position | f-block (shown below the main table) |
| State at 20 °C | Solid |
| Melting point | 1,132.2 °C |
| Boiling point | 4,131 °C |
| Density | 19.1 g/cm³ |
| Electronegativity | 1.38 |
| Electron configuration | [Rn] 5f3 6d1 7s2 |
About Uranium
Uranium has the symbol U and atomic number 92, which means every uranium atom has 92 protons in its nucleus and, in a neutral atom, 92 electrons. At room temperature it is a solid.
Actinides are the second row of the f-block. They are all radioactive, and only a few (like uranium and thorium) occur naturally in large amounts.
It melts at 1,132.2 °C and boils at 4,131 °C.
Explore it
See where uranium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.