|Themes > Science > Physics > Atomic Physics > Atomic Structure > New System of the Atom > Particle Classification > The Basic Parts of the Atom|
If we consider the three well-known particles:
we can see that the proton, which must be placed opposite the electron because of its charge, has a mass like the neutron's, almost exactly the same. Something is wrong with this classification that can't be fixed by a mere rearranging of the particles.
But replacing the proton with a neutron and an anti-electron gives us a more balanced arrangement.
And since these are listed by category, this is the same as:
This leaves a neutron of relatively large mass between two oppositely-charged electrons of small mass.