Scandium (Sc) — Element 21: Properties & Data | Aladdin Scientific
Scandium(Sc) — Element 21
Scandium (Sc) is a transition metal with atomic number 21 and atomic mass 44.9559. It has melting point 1814 K (1541 °C), boiling point 3109 K (2836 °C), density 2.99 g/cm³. It sits in group 3 and period 4 of the periodic table and was discovered in 1879.
Key facts
| Atomic mass | 44.9559 u |
|---|---|
| Electron configuration | [Ar]4s2 3d1 |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 1.36 |
| Atomic radius (van der Waals) | 211 pm |
| Ionization energy | 6.561 eV |
| Electron affinity | 0.188 eV |
| Melting point | 1814 K |
| Boiling point | 3109 K |
| Density | 2.99 g/cm³ |
| Standard state | Solid |
| Year discovered | 1879 |
Frequently asked questions
What is the electron configuration of scandium?
The ground-state electron configuration of scandium is [Ar]4s2 3d1.
What group and period is scandium in?
Scandium (Sc) is in group 3 and period 4 of the periodic table, classified as a transition metal.
What is the melting point of scandium?
Scandium melts at 1814 K (1541 °C).
What is the standard state of scandium?
Scandium is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .