Except neutrons are protons bound to electrons, so that's really just 4 of each, so maybe this is just some exotic Beryllium, or a clump of degenerate neutron gas as might escape from a dead-ish star.
Except neutrons are protons bound to electrons, so that's really just 4 of each, so maybe this is just some exotic Beryllium, or a clump of degenerate neutron gas as might escape from a dead-ish star.