當(dāng)前位置:首頁(yè) > 英漢互譯 > 英漢雙解無(wú)機(jī)化學(xué) > 正文

actinium
工業(yè)科技

        A soft,silvery-white,highly ra-dioactive metallic element of group 3 (for-merly ⅢB) of the periodic table. It is usual-ly considered to be the first member of theACTINOID series. It occurs in minute quan-tities in uranium ores as a result of the natu-ral ......(本文共 842 字)     [閱讀本文] >>

開(kāi)通會(huì)員,享受整站包年服務(wù)立即開(kāi)通 >