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92 U 238.03

Uranium (U)

Element 92 · Period 7 · Actinide series
actinide solid at room temp f-block radioactive

About Uranium

Primary fuel for nuclear reactors. U-235 is fissile. Dense metal also used in kinetic penetrators.

Physical Properties

Atomic Mass
238.03 u
State at 25°C
Solid
Melting Point
1132.3 °C
Boiling Point
3818 °C
Density
19.1 g/cm³
Magnetism
Paramagnetic

Atomic Properties

Electron Configuration
[Rn] 5f³ 6d¹ 7s²
Electron Shells
2, 8, 18, 32, 21, 9, 2
Electronegativity
1.38
Atomic Radius
240 pm
Ionization Energy
598 kJ/mol
Oxidation States
+3 to +6

Discovery & History

Discovered By
Martin Heinrich Klaproth
Discovery Year
1789
Named By
Martin Heinrich Klaproth

Name origin: Planet Uranus

Frequently Asked Questions

Is Uranium a metal, nonmetal, or metalloid?
Uranium is classified as a actinide.
What state is Uranium in at room temperature?
Uranium is a solid at standard room temperature (25°C).
What is the atomic mass of Uranium?
Uranium has an atomic mass of 238.03 atomic mass units (u).
Who discovered Uranium?
Uranium was discovered by Martin Heinrich Klaproth in 1789.
Where is Uranium on the periodic table?
Uranium is element number 92, located in period 7, part of the actinide series shown below the main table.
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