92U238.03
Uranium
ActinidesHeavy, radioactive metals. Most of them are made only in laboratories.
[Rn] 5f³ 6d¹ 7s²
- Atomic number
- 92
- Atomic mass
- 238.03
- Protons
- 92
- Neutrons
- 146 (most common)
- Electrons
- 92
- Shells
- 2, 8, 18, 32, 21, 9, 2
- State at 25 °C
- Solid
- Position
- Period 7, f-block
Proton (+)Neutron (0)Electron (−)
Discovered byMartin Heinrich Klaproth, 1789Martin Heinrich Klaproth: 3 elements
Named after the planet Uranus, discovered eight years earlier. In 1896 Henri Becquerel discovered radioactivity using uranium salts.
Did you know?
- It's the heaviest element found in large amounts in nature.
- One kilogram of uranium-235 can release about as much energy as burning millions of kilograms of coal.
Where it's found
- Pitchblende ore
- Jaduguda mine, Jharkhand
What it's used for
- Nuclear power fuel
- Once used to colour glass yellow-green
Try it
There's no safe home experiment for Uranium. Explore it with the animated atom above instead.