Key information
Atomic number: 
21
Atomic weight: 
44.96
Density: 
3000 kg/m³
Boiling point: 
3003.16° K
Melting point: 
1812.16° K
Heat vapour: 
339.2 kJ/mol
Heat fusion: 
15.91 kJ/mol
Thermal conductivity: 
1.5 W/m/K
Specific heat capacity: 
6.28 J/kg/K

Scandium was isolated as the oxide in 1879 by Lars Fredrick Nilson (1840-1899)and was shown by Cleve to be identical with the ekaboron (Eb) predicted by Dmitri Mendeleev.

Mendeleev and the Periodic Table

Mendeleev published the first Periodic Table of the Atomic Elements in 1869. Noting the gaps in the table, he predicted the existence of yet to be discovered elements. The predicted element ekaboron, filled the place in Mendeleev''s Table where scandium is located.

Electron Shell: 
Amazon Books
Image of The Last Sorcerers: The Path from Alchemy to the Periodic Table
Author: National Academy of Sciences, Richard Morris
Publisher: Henry (Joseph) Press (2003)
Binding: Hardcover, 294 pages