Atomic Physics - rest mass of Deuterium

  • Thread starter joeykeys
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Homework Statement



Calculate the rest mass of Deuterium nucleus.

Homework Equations



Is it correct to calculate its mass using hydrogen?
i.e. 2*rest mass of hydrogen?..

The Attempt at a Solution



As stated in text book,
the rest mass of deuterium = 3.34330*10^-27 kg

If it is calculated from hydrogen (my "theory" as above) = 2*(1.67338*10^-27) = 3.34676*10^-27 kg


My question is..
Is my theory correct or there is something wrong with my concept?..
Is there any correct ways to find out the mass of deuterium without looking from textbook's data?

Thank you!
 

Answers and Replies

  • #2
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I think the problem arises in the fact that a Deuterium nucleus is a Proton and a Neutron, not 2 Protons, and the masses are slightly different.
 

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