21
44.96
Sc
Scandium
Identification
CAS Number: 7440-20-2
Discovery Year: 1879
Discoverer: Lars Nilson
Discovery Location: Sweden
Properties
Atomic Dimensions
Atomic Radius: 160 pm →
Atomic Radius (Rahm): 263 pm
Covalent Radius: 170 pm →Van der Waals Radius: 215 pm
Metallic Radius: 144 pm
Atomic Volume: 15 cm³/mol
Lattice Constant: 3.31 Å
Thermodynamics
Electronic Structure
Electron Config: [Ar] 3d 4s2
Block: d
Period: 4 →Group: 3 →Electronegativity: 1.36 →Electron Affinity: 0.188 eV →Oxidation States: +3
Abundance & Geochemistry
Crust Abundance: 22 mg/kg
Sea Abundance: 6e-7 mg/L
Geochemical Class: first series transition metal
Goldschmidt Class: litophile
About
Rare soft silvery metallic element belonging to group 3 of the periodic table. There are ten isotopes, nine of which are radioactive and have short half-lives. Predicted in 1869 by Mendeleev, isolated by Nilson in 1879.
Isotopes
Sc-45 45 100.00%
