Scandium
Transition Metal
Scandium (Sc) is a chemical element with atomic number 21, classified as a transition metal. At room temperature it is a solid. It was discovered in 1879 by Lars Fredrik Nilson.
Properties
- Atomic number
- 21
- Atomic mass
- 44.956 u
- Category
- Transition Metal
- Group
- 3
- Period
- 4
- Block
- d-block
- Electron configuration
- [Ar] 3d¹ 4s²
- Phase at STP
- Solid
- Density
- 2.989 g/cm³
- Melting point
- 1814 K (1540.8 °C)
- Boiling point
- 3109 K (2835.8 °C)
- Electronegativity
- 1.36
- Atomic radius
- 184 pm
- Ionization energy
- 6.561 eV
- Discovery
- 1879 · Lars Fredrik Nilson
Common uses
Aerospace alloys, high-intensity lights, baseball bats
Did you know?
Lighter than aluminum but stronger than steel when alloyed.