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, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
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
Scandium: frequently asked questions
- What is Scandium?
- Scandium (Sc) is the chemical element with atomic number 21. It is a metal: specifically a transition metal.
- What is the atomic number of Scandium?
- Scandium's atomic number is 21, which means every Scandium atom has 21 protons in its nucleus.
- What is the electron configuration of Scandium?
- The electron configuration of Scandium is 1s2 2s2 2p6 3s2 3p6 4s2 3d1 (noble-gas shorthand: [Ar] 3d1 4s2). Its electrons are arranged in shells of 2, 8, 9, 2, with 2 in the outermost shell.
- Is Scandium a metal or a nonmetal?
- Scandium is a metal: specifically a transition metal.
- What group and period is Scandium in?
- Scandium is in group 3 and period 4 of the periodic table.
- Is Scandium a solid, liquid, or gas?
- At room temperature, Scandium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.