n.钋(放射性化学元素)

Polonium is a radioactive element that occurs naturally in uranium ores.
钋是一种天然存在于铀矿中的放射性元素。
Marie Curie discovered polonium in 1898 while working with pitchblende.
居里夫人在研究沥青铀矿时于1898年发现了钋。
Polonium-210 is used as a source of alpha particles for research purposes.
钋-210被用作科研目的的α粒子源。
The assassination of Alexander Litvinenko was carried out using polonium-210.
亚历山大·利特维年科被使用钋-210暗杀。
Polonium has several isotopes, some of which are more stable than others.
钋有几个同位素，其中一些比其他更稳定。
Due to its radioactivity, polonium must be handled with extreme care.
由于其放射性，钋必须极其小心地处理。
Polonium can be produced artificially by bombarding bismuth with neutrons.
钋可以通过中子轰击铋人工生产。
The half-life of polonium-210 is only 138 days.
钋-210的半衰期只有138天。
Polonium is named after Poland, the birthplace of Marie and Pierre Curie.
钋以居里夫妇的出生地波兰命名。
Polonium is a silvery-gray metal that reacts readily with oxygen and halogens.
钋是一种银灰色金属，容易与氧气和卤素反应。