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chemistry

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how do i do this:
give the number of protons, electrons, and neutrons in each of the following atoms.

108
47 Au

40
20 Ca

23
11 Na

  • chemistry -

    The first one.
    The atomic number is the number of protons. That is 47 in this example. The 108 is the mass number and gives the number of protons + the number of neutrons. Therefore, the number of neutrons is the mass number minus the number of protons. The number of electrons is the same as the number of protons.

  • chemistry -

    ok so for the calcium one would it be
    20 electrons
    20 protons
    and
    20 neutrons?

  • chemistry -

    yes, yes, and yes.

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