Scandium

Document v1 · published by Koskamo · updated 2026-10-04

Scandium (Sc) is chemical element 21, a transition metal in group 3, period 4 (PubChem).

Atomic number: 21
Symbol: Sc
Group: 3
Period: 4
Atomic mass: 44.95591 u
Electron configuration: [Ar]4s2 3d1
Electronegativity (Pauling scale): 1.36
Atomic radius (van der Waals): 211 pm
Ionization energy: 6.561 eV
Electron affinity: 0.188 eV
Oxidation states: +3
Standard state: Solid
Melting point: 1814 K
Boiling point: 3109 K
Density: 2.99 g/cm³
Chemical group: Transition metal
Year discovered: 1879

Source and provenance

Original source: pubchem.ncbi.nlm.nih.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: PubChem periodic table data (NIH/NLM, pubchem.ncbi.nlm.nih.gov/ptable); group and period from Jefferson Lab via PubChem

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Version history

Published by Koskamo2026-10-04
Version 1