21 Sc 44.956
Scandium
transition metal
Properties
- Atomic number
- 21
- Atomic mass
- 44.956 u
- Category
- transition metal
- Group
- 3
- Period
- 4
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.36 (Pauling)
- Density
- 2.985 g/cm³
- Melting point
- 1540.85 °C
- Boiling point
- 2835.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹
Noble-gas shorthand: [Ar] 3d¹ 4s²
Electrons per shell: 2, 8, 9, 2 — that's 2 in the outermost shell.
About Scandium
Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia.
- Discovered by Lars Fredrik Nilson
- Appearance: silvery white
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.