Physics help please

    • Thread Starter

    What is the mass of an oxygen nucleus in kg? (with working please)

    thank you

    Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.

    Just quoting in Fox Corner so she can move the thread if needed :wizard:
    (Original post by Fox Corner)

    (Original post by esmithxx)
    What is the mass of an oxygen nucleus in kg? (with working please)

    thank you
    Assume you are computing oxygen-16 nucleus, there are 8 protons and 8 neutrons, you use the mass of neutron and proton to compute the mass of oxygen-16 nucleus.


mass of proton = 1.6727 \times 10^{-27} \text{ kg}

mass of neutron = 1.6750 \times 10^{-27} \text{ kg}

mass of oxygen-16 = 8 \times 1.6727 \times 10^{-27} + 8 \times 1.6750 \times 10^{-27}

    I believe you can press the calculator yourself.
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