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    A chlorine atom contains 17 protons and 17 electrons. About 25% of chlorine atoms are the chlorine-37 isotope. How many neutrons does one of these atoms contain?

    How do I work this out?
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    What are nuclei made out of?
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    (Original post by alow)
    What are nuclei made out of?
    Is it cheese?

    Oh hang on, that's the Moon.

    It is beeswax?
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    lol, man i remember dem type of questions, so happy im done with chemistry. Wait is that physics or chem?
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    (Original post by gnewton12)
    A chlorine atom contains 17 protons and 17 electrons. About 25% of chlorine atoms are the chlorine-37 isotope. How many neutrons does one of these atoms contain?

    How do I work this out?
    Remember that an isotope has the same number of protons but a different amount of neutrons.
 
 
 
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