atomic number 104

Noun
  1. A radioactive transuranic element which has been synthesized (synset 114677595)
    is a type of: chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
    same as: element 104, rf, rutherfordium, unnilquadium, unq

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