Scandium

Symbol: Sc
Atomic number: 21
Category: transition metals
Group: 3
Period: 4
Block: d
Atomic weight: 44.955912 g/mol
Electrons per shell: 2, 8, 9, 2
CAS number: 7440-20-2
Phase: solid
Density: 2.985 kg/l (near room temperature)
Melting point: 1814 K (1541C, 2806F)
Boiling point: 3109 K (2836C, 5136F)
Crystal structure: hexagonal
Oxidation states: 3, 2, 1
Electronegativity: 1.36 (Pauling scale)
Name's origin: Scandia
Name's meaning: Scandinavia, as the element was found within the minerals euxenite and gadolinite from Scandinavia
Facts:
- is present in most of the rare earth element and uranium deposits, but it is extracted from these ores only in a few mines world wide
- is a rare, hard, silvery, rough, very dark metallic element that develops a slightly yellowish or pinkish cast when exposed to air
- is a rare earth element along with yttrium and the lantanides