38Sr
Strontium
Alkaline Earth MetalStrontium (Sr) is element 38, an alkaline earth metal, in period 5 and group 2 of the periodic table. Its standard atomic weight is 87.62, it melts at 777 °C and boils at 1382 °C. Discovered by Adair Crawford, 1790.
Atomic Number38
SymbolSr
NameStrontium
Atomic Weight87.62 u
CategoryAlkaline Earth Metal
Period5
Group2
Melting Point777 °C
Boiling Point1382 °C
Density2.64 g/cm³
Electron Config[Kr] 5s2
Discovered ByAdair Crawford, 1790