Uranium (U)
Uranium (U, element 92) is an actinide in period 7. Atomic mass 238.029, electron configuration [Rn] 5f³ 6d¹ 7s², uses and facts.
About Uranium
Uranium is an actinide with the symbol U and atomic number 92. It is a solid at room temperature, and it sits in period 7 of the periodic table. Uranium was discovered in 1789 by Martin Heinrich Klaproth.
Uranium key facts
- Atomic number: 92
- Symbol: U
- Atomic mass: 238.029 u
- Category: actinide
- Group: none (f-block)
- Period: 7
- State at room temperature: solid
- Electron configuration: [Rn] 5f³ 6d¹ 7s²
- Electronegativity (Pauling): 1.38
- Melting point: 1405.3 K (1132.15 °C)
- Boiling point: 4404 K (4130.85 °C)
- Density: 19.05 g/cm³
- Common oxidation states: +1, +2, +3, +4, +5, +6
Electron configuration
The electron configuration of uranium is [Rn] 5f³ 6d¹ 7s². The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells.
Uses of uranium
- Nuclear power
- Nuclear weapons
- Density counterweights
Did you know?
The energy in 1 kg of uranium equals about 1,500 tonnes of coal. One fuel rod can power a home for 5 years.
Neighbouring elements
- Protactinium (Pa)
- Neptunium (Np)
- Actinium (Ac)
- Thorium (Th)
- Protactinium (Pa)
- Neptunium (Np)
- Plutonium (Pu)
- Americium (Am)
- Curium (Cm)
- Berkelium (Bk)
Frequently asked questions
What is the atomic number of uranium?
The atomic number of uranium is 92, which means every uranium atom has 92 protons.
What is the electron configuration of uranium?
The electron configuration of uranium is [Rn] 5f³ 6d¹ 7s².
What group and period is uranium in?
Uranium is an actinide in period 7.
What state is uranium at room temperature?
Uranium is a solid at room temperature.
What is uranium used for?
Uranium is used for nuclear power, nuclear weapons, density counterweights.