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Erbium (Er) properties


Atomic mass, symbol and atomic number

erbium is a natural element with the element symbol Er and atomic number 68. In the periodic table it belongs to the lanthanides with an atomic mass of 167,26 u. The chemical element discovered by Carl Gustav Mosander in 1843 is not radioactive and is in a solid state of aggregation at room temperature.

Profile: Erbium (English Erbium)

General
Chemical element:erbium
Symbol:He
Atomic number:68
Group:lanthanides
Period:6
Block:f-block
Series:lanthanides
Appearance:silver
explorers:Carl Gustav Mosander
Year of discovery:1843
Atomic properties
Atomic mass:167,26 u
Atomic radius:175 pm
Covalent radius:189 pm
Van der Waals radius:???
Electron configuration:Xe 4f12 6s2
ionization:589.3 kJ / mol
Physical Properties
Physical state:firmly
Density:???
Crystal structure:hexagonal
Magnetism:paramagnetic
molar volume:18,4 · 10-6 m3/ mol
Mohs hardness:???
Melting point:1529 ° C
Boiling point:2900 ° C
Heat of fusion:19.9 kJ / mol
Heat of vaporization:280 kJ / mol
Thermal conductivity:15W
Chemical properties
electronegativity:1,24

Did you know that ...

  • Erbium belongs to the metals of the rare earths?
  • the elements erbium, yttrium, holmium, terbium and thulium could be detected for the first time in a Swedish mine (pit Ytterby)?
  • Erbium oxides have a pink color?