polonium

名词 polonium:

1. a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor
   同义词：Po, atomic number 84

po.lo.ni.um

n.Symbol Po （名词）符号 Po
A naturally radioactive metallic element, occurring in minute quantities as a product of radium disintegration and produced by bombarding bismuth or lead with neutrons. It has 27 isotopes ranging in mass number from 92 to 28, of which Po 20, with a half-life of 38.39 days, is the most readily available. Atomic number 84; melting point 254=C; boiling point 9'2=C; specific gravity 9.32; valence 2, 4.See table at element
钋：一种具有天然辐射性的金属元素，作为镭分裂的产物以极小量出现，可通过用中子轰击铋或铅获得。它从92到28的质量数中可排列为27种同位素，其中的钋20半衰期达38.39天，是最易得到的同位素。原子序数84；熔点254=C；沸点9'2=C；比重9.32；化合价2, 4参见 element

来源：
From Medieval Latin Polônia [Poland]
源自 中世纪拉丁语 Polônia [波兰]