stron·ti·um (str n ch - m, -t-m, -shm)n. Symbol Sr A soft, silvery, easily oxidized metallic element that ignites spontaneously in air when finely divided. Strontium is used in pyrotechnic compounds and various alloys. Atomic number 38; atomic weight 87.62; melting point 769°C; boiling point 1,384°C; specific gravity 2.54; valence 2. See Table at element. [From New Latin strontia, strontium oxide, from English strontian; see strontianite.] stron tic (-t k) adj. |
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