Scandium

Chaitra 26/06/2026 19:58:08 Updated 26/06/2026 19:58:08

Property	Value
Atomic Number	21
Element	Scandium
Symbol	Sc
Atomic Mass	44.956 u
Number of Neutrons	24 (most common isotope, Scandium-45)
Number of Protons	21
Number of Electrons	21
Period	4
Group	3
Phase	Solid
Radioactive	No
Natural	Yes
Metal	Yes
Nonmetal	No
Metalloid	No
Type	Transition Metal
Atomic Radius	184 pm
Electronegativity	1.36 (Pauling scale)
First Ionization Energy	6.561 eV
Density	2.99 g/cm³
Melting Point	1541 °C
Boiling Point	2836 °C
Number of Isotopes	1 stable (Scandium-45)
Discoverer	Lars Fredrik Nilson
Year	1879
Specific Heat	0.568 J/g·K
Number of Shells	4
Number of Valence Electrons	3