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Plutonium (Pu) properties


Atomic mass, symbol and atomic number

plutonium is a natural element with the element symbol Pu and atomic number 94. In the periodic table it belongs to the actinoids with an atomic mass of 244.064 u. The chemical element discovered by Glenn T. Seaborg in 1940 is radioactive and is in a solid state of aggregation at room temperature.

Profile: Plutonium (English plutonium)

General
Chemical element:plutonium
Symbol:Pu
Atomic number:94
Group:actinides
Period:7
Block:f-block
Series:actinides
Appearance:silver
explorers:Glenn T. Seaborg
Year of discovery:1940
Atomic properties
Atomic mass:244.0642 u
Atomic radius:151 pm
Covalent radius:187 pm
Van der Waals radius:unknown
Electron configuration:Rn 5f6 7s2
ionization:584.7 kJ / mol
Physical Properties
Physical state:firmly
Density:19.816 g / cm3
Crystal structure:monoclinic
Magnetism:paramagnetic
molar volume:12,29 · 10-6 m3/ mol
Mohs hardness:unknown
Melting point:639 ° C
Boiling point:3230 ° C
Heat of fusion:11.48 kJ / mol
Heat of vaporization:325 kJ / mol
Thermal conductivity:6.7 W
Chemical properties
electronegativity:1,28

Did you know that ...

  • the element plutonium was named after the planet Pluto?
  • Nagasaki's atomic bomb "Fat Man" contained plutonium as fissile material?
  • Plutonium is one of the rarest occurring elements on earth?
  • the longest-lived plutonium isotope has a half-life of over 80 million years?
  • Depending on the oxidation state, plutonium appears in different colors?