单词	strontium
释义	strontium /ˈstrɒntɪəm / /ˈstrɒnʃ(ɪ)əm / noun [mass noun] The chemical element of atomic number 38, a soft silver-white metal of the alkaline earth series. Its salts are used in fireworks and flares because they give a brilliant red light. (Symbol: Sr) The Scottish village is Strontia and the element is the alkaline earth metal strontium.... Because of its chemical closeness to calcium, strontium can comfortably replace the lighter element in enamel, dentin, and bone. ARS developed methods using calcium to remove strontium - 90 radioactivity from wheat and milk in 1962. Origin Early 19th century: from strontia + -ium.
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