The chemical symbol for Scandium is Sc and its atomic number is 21.
We find it listed in the periodic table of elements in group 3 and 4 period and block.
Scandium belongs to the family or chemical series of transition metals such as for example the Silver, the Bohrium, cadmium, ...
This element is stable.
Scandium came from the town name Scandia.
Atomic number (Z) 21
Group, block group 3, d-block
Period: period 4
Element category: transition metal
Standard atomic weight (±) (Ar): 44.955908(5)
Electron configuration: [Ar] 3d1 4s2
per shell: 2, 8, 9, 2
Physical properties
Phase: solid
Melting point: 1814 K (1541 °C, 2806 °F)
Boiling point: 3109 K (2836 °C, 5136 °F)
Density near r.t.: 2.985 g/cm3
when liquid, at m.p. 2.80 g/cm3
Heat of fusion 14.1 kJ/mol
Heat of vaporization: 332.7 kJ/mol
Molar heat capacity 25.52 J/(mol•K)
Atomic properties
Oxidation states: 3, 2, 1 (an amphoteric oxide)
Electronegativity: Pauling scale: 1.36
Ionization energies:1st: 633.1 kJ/mol
2nd: 1235.0 kJ/mol
3rd: 2388.6 kJ/mol
Atomic radius empirical: 162 pm
Covalent radius: 170±7 pm
Van der Waals radius: 211 pm
Crystal structure: hexagonal close-packed
Thermal expansion α, poly: 10.2 µm/(m•K) (at r.t.)
Thermal conductivity: 15.8 W/(m•K)
Electrical resistivity: α, poly: 562 nΩ•m (at r.t., calculated)
Magnetic ordering: paramagnetic
Young's modulus: 74.4 GPa
Shear modulus 29.1 GPa
Bulk modulus: 56.6 GPa
Poisson ratio: 0.279
Brinell hardness: 736–1200 MPa
CAS Number 7440-20-2