• Question: how many atoms does uranium have?

    Asked by grago to Susana on 26 Jun 2013.
    • Photo: Susana Teixeira

      Susana Teixeira answered on 26 Jun 2013:


      Uranium is an element, so if you are talking about a single atom that is all it has, the one atom.
      If you are talking about, for example, 1gram of Uranium and it is only Uranium-238 in that sample (other isotopes are also common), you would have 2.5×10^21 atoms in there.

      The maths is simple: divide the weight of your sample by the atomic mass of Uranium-238 to find out how many moles are in there, and then multiplying by Avogadro’s number.

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