What is the interrelationship between electrons, neutrons and protons

We consider them to be made of 3 quarks, 'uud' for the proton and 'udd' for theneutron where 'u' is the up quark and 'd' the down quark. ... Now, protons and neutrons are basically found at the atomic nucleus while electrons form the shell of the atom, moving around the nucleus.

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