Atomic number: 21
Category: transition metal
Density at 25°C: solid 2.985 g·cm−3
Scandium is a rare earth metal. It was so tricky to refine from ores that it didn't make much of an appearance until the 1970s, and then mostly for alloys.
Occasionally it is used with other elements as part of medical lasers.
Use, natural applications or common combinations:
- Standard atomic weight: 44.955 912(6)
- Melting point: 1541 °C
- Boiling point: 2836 °C
- Radioactivity: naturally stable