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einsteinium

[ ahyn-stahy-nee-uhm ]

noun

, Chemistry, Physics.
  1. a transuranic element. : Es; : 99.


einsteinium

/ aɪnˈstaɪnɪəm /

noun

  1. a metallic transuranic element artificially produced from plutonium. Symbol: Es; atomic no: 99; half-life of most stable isotope, 252Es: 276 days


einsteinium

/ īn-stīnē-əm /

  1. A synthetic, radioactive metallic element of the actinide series that is usually produced by bombarding plutonium or another element with neutrons. It was first isolated in a region near the explosion site of a hydrogen bomb. Its longest-lived isotope is Es 254 with a half-life of 276 days. Atomic number 99; melting point 860°C.


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Word History and Origins

Origin of einsteinium1

1950–55; named after Albert Einstein; -ium

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Word History and Origins

Origin of einsteinium1

C20: New Latin, named after Albert Einstein

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EinsteinianEinstein model