In detail

Uranium (U) properties


Atomic mass, symbol and atomic number

uranium is a natural element with the element symbol U and atomic number 92. In the periodic table it belongs to the actinoids with an atomic mass of 238.02 u. The chemical element discovered by Martin Heinrich Klaproth in 1789 is radioactive and is in a solid state of aggregation at room temperature.

Profile: Uranium

General
Chemical element:uranium
Symbol:U
Atomic number:92
Group:actinides
Period:7
Block:f-block
Series:actinides
Appearance:silver
explorers:Martin Heinrich Klaproth
Year of discovery:1789
Atomic properties
Atomic mass:238.02 u
Atomic radius:138 pm
Covalent radius:142 pm
Van der Waals radius:???
Electron configuration:Rn 5f3 6d1 7s2
ionization:597.6 kJ / mol
Physical Properties
Physical state:firmly
Density:19.16 g / cm3
Crystal structure:orthorhombisch
Magnetism:paramagnetic
molar volume:12,49 · 10-6 m3/ mol
Mohs hardness:3
Melting point:1133 ° C
Boiling point:3930 ° C
Heat of fusion:15 kJ / mol
Heat of vaporization:417.1 kJ / mol
Thermal conductivity:27 W
Chemical properties
electronegativity:1,38

Did you know that ...

  • the element uranium owes its name to the planet Uranus?
  • Fuels with uranium as nuclear fuel from yellow uranium powder, so-called yellowcake, are made?
  • By far the most uranium in Kazakhstan is promoted?
  • Uranium used to dye glass and dishes?
  • nuclear-grade uranium requires an enrichment level of over 80%? For comparison, about 3-4% is enough to generate energy in nuclear power plants.