Scandium (Sc), element 21 – Learn Acer periodic table

Transition metal, atomic number 21.

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.

Symbol Sc. Atomic mass 44.9559085 u. Group 3, period 4. Electron configuration [Ar] 3d1 4s2. Electrons per shell 2, 8, 9, 2. State at room temperature: Solid. Melting point 1540.8 °C, boiling point 2835.8 °C. Discovered by Lars Fredrik Nilson.

Element data from Wikipedia, CC BY-SA 3.0.

Scandium (Sc), element 21 – Learn Acer periodic table

Scandium

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