Nuclear binding energy Explained

What is binding energy and where does it come from?
What holds an atom's nucleus together?

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[mathletics]

I really love the quality of teaching!
Thank you sir.

[JellyScrub]

Thank you so much! I had never thought of stability being to do with binding energy per nucleon and now it makes so much sense!

[PerimeterPermaculture]

ok, i have a question. taking a proton for instance, it's mass according to NIST is 1.672621898x10-27kg. So when it's converted into u it becomes 1.00728? do i understand this correctly?

[voltaaire]

5:20 What is the BE? "It is the energy required to hold the nucleus together." Not really...
The binding energy is the energy that was lost when the neutrons and protons came together.
When 0.309 u mass is lost to bind nucleons in a chlorine nucleus, its energy equivalent 287.8 MeV is also lost. The nucleus is held together by the nuclear force.

see *Nuclear force. (2023, June 21). In Wikipedia*
"At short range, the attractive nuclear force is strong enough to overcome the electromagnetic force. The nuclear force binds nucleons into atomic nuclei. The nuclear force is powerfully attractive between nucleons at distances of about 0.8 fm, but rapidly decreases to insignificance at distances beyond 2.5 fm. At distances less than 0.7 fm, the nuclear force becomes repulsive."

[MuhammadAfzal-tkxl]

Why do we take C12 atom to calculate atomic masses when FE56 is the most stable element in the periodic table???

[roeyeshkar]

Hello, I have a question, in the video you defined binding energy as the energy that is required to keep all the parts together, but in a lot of places online its defined as "The energy required to completely disassemble it into separate protons and neutrons", can you please explain why both of those definitions are the same?

[fritzzz]

Sorry, but this video is partly wrong. The mass of a nucleus is reflective of all the energy contained in it according to E=mc^2, so even if the mass defect energy went into binding energy, it would still show up on the scale since it is energy contained in the nucleon and thus contributes to the nucleon's mass. Also, if the mass defect energy went into binding energy, how would fission bombs or fission reactors like the sun work? The energy clearly leaves the atom. In fact, binding the nuclei together does not take energy, but releases it. If it took energy, why would it happen in the first place without anything forcing it to? It just like two masses falling towards each other according to gravity, it happens by itself and releases energy when the two collide.

[vihanroy]

Hi Sir. I was wondering if the e=mc^2 relationship is what determines the amount of binding energy then why is energy also released from the nuclei (which is supposed to be a trait of fusion reactions)
Thanks Sir

[jasonwiley]

Are binding energy and residual strong force (nuclear force) related? Seems they should be.