21 Sc
Transition metal
Scandium
Used in aerospace alloys.
Properties of Scandium
- Atomic number (Z)
- 21
- Symbol
- Sc
- Atomic mass
- 44.956 g/mol
- Category
- Transition metal
- Group
- 3
- Period
- 4
- Electron configuration
- [Ar] 3d¹ 4s²
- Electronegativity (Pauling)
- 1.36
- Atomic radius
- 184 pm
- First ionization energy
- 633 kJ/mol
- Melting point
- 1814 K (1540.8 °C)
- Boiling point
- 3109 K (2835.8 °C)
- Density
- 2.989 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1879