Category:Strontium

Stron"ti*um, n. Etym: [nl. See strontia.] (chem.)

Defn: a metallic element of the calcium group, always naturally Occurring combined, as in the minerals strontianite, celestite, etc. It is isolated as a yellowish metal, somewhat malleable but harder Than calcium. It is chiefly employed (as in the nitrate) to color Pyrotechnic flames red. Symbol sr. Atomic weight 87.3. A radioactive Isotope of strontium produced by certain nuclear reactions, and Constituting one of the prominent harmful components of radioactive Fallout from nuclear explosions; also called radiostrontium. It has a Half-life of 28 years.