>>13454386>Why isn't the nuclei subject to the uncertainty principle?Yes it is. The nucleus is modeled in similar way atom is and protons and neutrons fill up energy levels as they go on the periodic table.
This is the way the island of stability was predicted.
https://en.wikipedia.org/wiki/Nuclear_shell_modelThe nucleons themselves are made up of quarks which obey the laws of quantum chromodynamics (theory of strong interaction) and nuclear force between nucleons is presumed to be the residual strong force between nucleons (pic related), much weaker than the strong force itself.
How exactly do equations of QCD yield the nuclear shell model is a yet unsolved problem in physics because it's a complicated many-body problem and only nuclei up to 12 nucleons have been simulated.