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What is the formula for Mass defect?

Posted in Atoms, Molecules and Nuclei | Email This Post Email This Post |

Mass defect is the difference between the actual mass of nucleus and sum of masses of constituent nucleons.

The formula for Mass defect is given as,
m = [Z mp + (A – Z)mn] – M

M = mass of nucleus
A = mas number                           
mp = mass of proton
Z = atomic number                              
(A – Z) = number of neutron
mn = mass of neutron                          

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