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Find mass defect, binding energy and BE/...

Find mass defect, binding energy and BE/nucleon for He nuclei. Take mass of He nucleus `=4.001509u`, `M_p = 1.007825u` and `M_n = 1.008665 u`

Text Solution

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`._2He^4` contains 2 proton and 2 neutrons
Mass defect `=2xx1.007277+2xx1.008666-4.001509`
`=0.0304u`
As `1 u=931MeV`, therefore,
binding energy `=0.0304xx931MeV`
`=28.280MeV`
B.E./nucleus `=("Total B.E.")/4=28.280/4`
`=7.07MeV//n`
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