atomic number 45

Definitions of atomic number 45
  1. noun
    a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum
    synonyms: Rh, rhodium
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    type of:
    metal, metallic element
    any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
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