atomic number 103

Definitions of atomic number 103
  1. noun
    a radioactive transuranic element synthesized from californium
    synonyms: Lr, lawrencium
    see moresee less
    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
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