SELENIUM [[[symbol]] Se, atomic weight 79.2 (0 =16)], a nonmetallic chemical element, discovered in 1817 by J.
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SILICON [[[symbol]] Si, atomic weight 28.3 (0=16)], a nonmetallic chemical element.
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46 (1888); Florida, South Carolina and Canadian Phosphates, by C. C. Hoyer Miller (London, 1892); and The Nonmetallic Minerals, by G.
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nonmetallic与发音含义,同义词,反义词,翻译,刑和更多的