Example:
Calculate the mass difference for a helium nucleus in atomic mass units, and in kilograms
Mass of 2p + 2n = (2 x 1.00728 u) + (2 x 1.00867 u)
= 4.03190 u
But mass of helium nucleus = 4.00151 u
Mass difference = 4.03190 u - 4.00151 u
= 0.03039 u
= 0.03039 x 1.6605 x 10-27
kg
= 5.046 x 10-29
kg
Mass of proton -- 1.00728 u
Mass of neutron -- 1.00867 u
Mass of helium nucleus -- 4.00151 u
Calculate the energy equivalent of the mass difference for the helium nucleus from example 1.
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