1. Can anybody explain to me why the nucleus weights less because of binding energy?

2.

3. this is the definition i get if thats any help

Code:
`has definition The energy required to break up a system. In particular, the binding energy of an atomic nucleus is the energy released in the formation of the nucleus. The most strongly bound nuclei are those with atomic weights between about 50 and 65 (the iron group). Lighter nuclei are less strongly bound because of their larger surface-to-volume ratios; heavier nuclei, because the effects of Coulomb repulsion increase with the nuclear charge.`

4. I understand what binding energy is. I do not understand why the nucleus weights less because of binding energy.But thank you anyway.

5. A nucleus should actually have a greater mass due to binding energy due to the whole E=mc<sup>2</sup> thing. The mass of a nucleus will be greater than the total combined mass of its nucleons, due to the presence of binding energy.

6. Chemboy that is exactly what I thought, but here is a direct quote from my physics book. Am I interpreting this wrong? Or does it say the opposite of what it should?

"One way to interpret this mass change is to say that a nucleon inside a nucleus has less mass than its rest mass outside the nucleus. How much less depends on which nucleus. The mass difference is related to "binding energy" of the nucleus."

7. Well I talked to my teacher yesterday, and he said he thinks it is because as you take a part a nucleus, if you could, the binding energy would then be converted to mass and the nucleons would then weight more outside of the nucleus then they did inside the nucleus.

8. Originally Posted by EV33
Well I talked to my teacher yesterday, and he said he thinks it is because as you take a part a nucleus, if you could, the binding energy would then be converted to mass and the nucleons would then weight more outside of the nucleus then they did inside the nucleus.
Zigackly. Think of it as the energy required to free the nucleon from the nucleus. This energy is represented in the nucleon in the form of mass.

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