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    In the equation representing beta + decay where a proton decays into a neutron:

    proton -> neutron + positron + neutrino

    How is mass being conserved in this equation? From my understanding, isn't the mass of a proton slightly less than the mass of a neutron? Even more, a positron also has mass and so does a neutrino (albeit very very small). Overall the equation doesn't look balanced to me because the right side seems to hold more mass.
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    (Original post by scientific222)
    In the equation representing beta + decay where a proton decays into a neutron:

    proton -> neutron + positron + neutrino

    How is mass being conserved in this equation? From my understanding, isn't the mass of a proton slightly less than the mass of a neutron? Even more, a positron also has mass and so does a neutrino (albeit very very small). Overall the equation doesn't look balanced to me because the right side seems to hold more mass.
    Energy and mass equivalence E=mc2

    The binding energy of the proton is converted to mass in the decay. The energy of the constituent parts reduces as a result.
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    (Original post by uberteknik)
    Energy and mass equivalence E=mc2

    The binding energy of the proton is converted to mass in the decay. The energy of the constituent parts reduces as a result.
    Thanks a lot. I was also wondering if you could answer another question on the topic if you don't mind. Here is a picture of an equation (beta minus decay) in my textbook.

    Name:  what.PNG
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    From what I know when they represent the nucleus of elements using the superscripts and subscripts; the top number is the nucleon number (proton + neutron), and the bottom number is the proton number. So why is it that for an electron they are representing a negative charge in the space where the proton number usually is? Shouldn't that space be zero for an electron?
 
 
 
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