Atomic number 21
Scandium
Transition metal
Quick facts
- Atomic mass
- 44.956
- Group
- 3
- Period
- 4
- State (STP)
- solid
- Electronegativity
- 1.36
- Common ox. states
- +3
Properties
Electron configuration
[Ar] 3d¹ 4s²
- Ionization energy
- 633.1 kJ/mol
- Electron affinity
- 18.1 kJ/mol
- Melting point
- 1814.00 K (1540.8 °C)
- Boiling point
- 3109.00 K (2835.8 °C)
How it bonds
Scandium loses its 4s² and 3d¹ electrons to form Sc³⁺. With no remaining d-electrons, scandium compounds are colorless and behave more like a typical group-3 metal than the colorful d-block elements that follow it.