mass of C-12

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From: Camilla Lau (camillaklau@hotmail.com)
Date: Fri Oct 13 2000 - 07:49:49 PDT 

From: "Camilla Lau" <camillaklau@hotmail.com>
Subject: mass of C-12
Date: Fri, 13 Oct 2000 14:49:49 GMT
Message-ID: <F207bxcbz37cfJiY9ZN0000333d@hotmail.com>

I have a question about the masses of protons, neutrons, and the carbon-12
atom. In my texts, it says the masses of proton and neutrons are just over
1 amu. How does this work, if 1 amu is defined as 1/12 the mass of
carbon-12? Furthermore, the masses of other elements are less than their
mass number. Does some of the mass go into the energy of the atom? Thanks!
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