Now what would have to be true for an electron to fit inside a Neutron? Lets see.
Angular momentum of electron = (planks constant)/(2pi) Relativistic angular momentum = γmvr Relativistic centripetal force = γmv^2/r
Gamma*(electron mass)c(10^-14 m)=(planks constant)/(2pi) solve for gamma Wolfram says gamma = 38.6
38.6*(electron mass)*(velocity of light)^2/(10^-14 m) Wolfram says force = 316 newtons
The force between 2 electrons at that distance is ( Coulomb's constant )*(electron charge)^2/(10^-14 m)^2 Wolfram says 2.3 newtons
According to those equations the force holding the electron inside the neutron is 137 times stronger than electrostatic repulsion would be at that distance Which means the strong force is 10 billion times stronger than the usual electromagnetic forces that are responsible for chemical reactions