21Sc
Element 21
Scandium
Transition metals
Scandium is a chemical element with symbol Sc and atomic number 21.
Key data
- Atomic number
- 21
- Atomic mass
- 44.956 u
- Group / Period
- 3 / 4
- Block
- d-block
- Phase at STP
- Solid
- Density
- 2.985 g/cm³
- Melting point
- 1540.8 °C
- Boiling point
- 2835.8 °C
- Electron configuration
- [Ar] 3d1 4s2
Common uses
- •Aerospace alloys
- •Stadium lighting
- •Bicycle frames
Discovery
Year: 1879
Discovered by: Lars Fredrik Nilson
Frequently asked questions
What is the atomic number of Scandium?
Scandium has atomic number 21. Its symbol is Sc and its atomic mass is 44.956 u.
What category of element is Scandium?
Scandium is classified as transition metals. It sits in group 3, period 4 of the periodic table.
What is Scandium used for?
Common uses of Scandium include: Aerospace alloys, Stadium lighting, Bicycle frames.
When was Scandium discovered?
Scandium was discovered in 1879 by Lars Fredrik Nilson.
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