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Homework Help: Protons Neutrons Electrons

  1. Jul 25, 2007 #1
    1. The problem statement, all variables and given/known data

    state the number of protons electrons and neutrons of these:

    2. Relevant equations

    protons is the same as atomic numbber, same with electrons. NEUTrons is atomic number - atomic mass

    3. The attempt at a solution

    Magnesium-25 Cu-65
    p- 12 p-29
    e-12 e-29
    n 25-12=13 n-65-29=36

    am i right?
  2. jcsd
  3. Jul 25, 2007 #2


    User Avatar
    Homework Helper
    Gold Member

    Looks good.
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