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polonium

/puh-loh-nee-uhm/US // pəˈloʊ ni əm //UK // (pəˈləʊnɪəm) //

钋,钋的,钚,钋的作用

Definitions

n.名词 noun
  1. 1

    Chemistry.

    • : a radioactive element discovered by Pierre and Marie Curie in 1898; Symbol: Po; atomic number: 84; atomic weight: about 210.

Examples

  • She discovered the element radium, and later polonium, near the end of the 19th century.

  • Once the polonium had been recognized, police were able to trace the source of the poison to the Millennium hotel in Mayfair.

  • That would be Nobel Prize winner Marie Curie, the gal who discovered radioactive polonium.

  • Did he understand that he would now have to live with a sword—not of Damocles but of polonium—hanging over his head?

  • Polonium is also at the center of a major plot line currently playing out on the daytime soap opera General Hospital.

  • Was the Palestinian leader poisoned by radioactive polonium?

  • One such reaction uses alpha particles emitted by polonium-210 (or some other alpha emitter) to bombard the element beryllium.

  • Four successive alpha captures would give Polonium 203, not mercury.

  • It is well known that Pierre and Marie Curie used this new-found radioactivity to identify the new elements polonium and radium.

  • Polonium, named by Mme. Curie in honor of her native country, was the third radioactive element to be discovered.

  • Her first discovery was that of the substance polonium—so named by Madame Curie after her native country, Poland.