Four Particles

To make everything add up in the Velcro universe, I had to declare the neutron a composite particle. Otherwise, it would have had close to no size, and by extension very little or no inertia (mass).

This means that the Velcro universe only knows four particles. They are:

1. The neutrino - composed of one neutral quantum
2. The photon - composed of three negative and three positive quanta
3. The electron - composed of one positive and two negative quanta
4. The proton - composed of 1088 negative and 1089 positive quanta

Everything beyond this are composite particles, made up of protons, electrons and neutrinos:

1. The neutron consisting of one proton, one electron and one neutrino
2. Atomic nuclei consist of one or more protons glued together with electrons and neutrinos

Of the four fundamental particles, the neutrino and photon have no inertia and move at a fixed speed. The electron and proton have inertia and move at a variable speed.

This is the total extent of the Velcro universe at the subatomic level. There are three quanta that produce four fundamental particles, two with inertia and two without inertia. Everything else is derived from this.