atomic number 45


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Noun1.atomic number 45 - a white hard metallic element that is one of the platinum group and is found in platinum oresatomic number 45 - a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum
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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