- #1

dav1d

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## Homework Statement

Calculate the binding energy per nucleon (J/nucleon) for

4 He - 4.0026u

239-Pu - 239.0522u

2H 2.0141u

56-Fe 55.9349u

Which nuclide is the most stable?

## Homework Equations

E=mc^2

## The Attempt at a Solution

If I know how to solve the first, I can solve the rest.

So, calculating for He

mass of the measured nucleus is 4.0026u

calculated mass= 2(p+n)=2(1.00728u+1.00866u)=4.03188u

delta M=-0.2928u

E=mc^2

=(-0.2928u)(3x10^8m/s)^2(1.66x10^-27kg/u)

=-4.374..x10^-11

The correct answer is -1.13x10^-12 J/nucelon

I'm not sure where I went wrong. Thanks for helping!