In an atomic nucleus what holds the protons together: the electrons, nuclear forces or gravitation? Which force is stronger?: neutron-neutron, neutron-proton or proton-proton?

5 answers

I thing it doesn't matter, that the bond strength depends on the charge of the neutrons/protons. I also know that protons are held together because of the nuclear forces. Can someone confirm?
nuclear forces hold all the particals in the nucleus.
And what about the pairs?

Neutron-neutron, neutron-proton, proton-proton? Is one stronger than the other or it depends on the charges?

Thank you very much,
honestly.
http://www.unclear2nuclear.com/np.php in deuterium only pn is stable
in larger atoms, it is much more complex
http://www.sjsu.edu/faculty/watkins/neutronrepulsion.htm
This is a bunch of articles in the latest MIT Physics department magazine (Physics at MIT 2017 Annual) about current research. It is about quarks and gluons. [ The Secret Life of Quarks, Lattice Quantum Chromodynamics, Jetting through the Quark Soup ]. I am not going to try to answer this question in greater detail than Bob Pursley has done.
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