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Noun: atomic number 99
  1. A radioactive transuranic element produced by bombarding plutonium with neutrons
    - einsteinium, Es, E

Type of: metal, metallic element

Nearest

atomic number 9
atomic number 90
atomic number 91
atomic number 92
atomic number 93
atomic number 94
atomic number 95
atomic number 96
atomic number 97
atomic number 98
atomic number 99
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