Results for « 符号Th » (cmn)
14658109-n
符号Th, 原子序90, 钍, 符号 Th, 原子序 90
thorium, Th, atomic number 90
     a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands
 

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