Tuesday, January 8, 2013
Strontium is a bivalent, silvery metallic element whose compounds resemble those of calcium. It is found in nature only in the combined state, as in strontianite, which is used in fireworks, flares, and tracer bullets. Strontium melting point is 770ºC. Symbol Sr; atomic weight 87.60; atomic number 38; valence 2.