Scandium (Sc) properties

Atomic mass, symbol and atomic number

scandium is a naturally occurring element with the element symbol Sc and atomic number 21. In the periodic table it stands with an atomic mass of 44.955 u in the 3rd subgroup. The chemical element discovered by Lars Fredrik Nilson in 1879 is not radioactive and is in a solid state at room temperature.

Profile: Scandium (Scandium)

Chemical element:scandium
Atomic number:21
Series:Transition metals
explorers:Lars Fredrik Nilson
Year of discovery:1879
Atomic properties
Atomic mass:44,955 u
Atomic radius:160 pm
Covalent radius:170 pm
Van der Waals radius:unknown
Electron configuration:Ar 3d1 4s2
ionization:633.1 kJ / mol
Physical Properties
Physical state:firmly
Density:2.985 g / cm3
Crystal structure:hexagonal
molar volume:15,00 · 10-6 m3/ mol
Mohs hardness:2,5
Melting point:1541 ° C
Boiling point:2730 ° C
Heat of fusion:16 kJ / mol
Heat of vaporization:310 kJ / mol
Thermal conductivity:16 W
Chemical properties

Did you know that ...

  • the chemist Dmitry Mendeleyev suspected the existence of the transition metal 10 years before the actual discovery?
  • Scandium belongs to the metals of the rare earths?
  • Lars Fredrik Nilson named the newly discovered element to Scandinavia (Latin scandia)?
  • Scandium on the air immediately begins to oxidize?
  • 0.1% scandium is enough to significantly improve the stability of aluminum?