21Sc
Scandium
Transition MetalScandium (Sc) is element 21, a transition metal, in period 4 and group 3 of the periodic table. Its standard atomic weight is 44.956, it melts at 1541 °C and boils at 2836 °C. Discovered by Lars Fredrik Nilson, 1879.
Atomic Number21
SymbolSc
NameScandium
Atomic Weight44.956 u
CategoryTransition Metal
Period4
Group3
Melting Point1541 °C
Boiling Point2836 °C
Density2.989 g/cm³
Electron Config[Ar] 3d1 4s2
Discovered ByLars Fredrik Nilson, 1879