As I understand, the atomic hypothesis and quantum theory says that we cannot divide the matter infinitely. Atoms were discovered 100 years ago but why are they indivisible apart? It is said that they consist of elementary particles that quantumly blur--probabilistically diffuse over space such that they cannot have components. I do not know about the probabilistic cloud that forms the particles at the bottom but I think what is said about reversibility of physical laws at the fundamental level.
It is said that we notice the friction at macroscopic level, the macroscopic objects slow down, because kinetic energy leaks down to microscopic level of the atoms, into the heat. However, atoms are indivisible and, thus, energy of moving atoms cannot go at even lower level. This proves that there is no more elementary level below. Elementary particles have no constituent parts that can move and steal energy from atoms when their electron clouds collide and rub against each other. If atoms were consisted of anything else, they would slow down as the macroscopic objects. But, if they are in perpetual motion, there is nothing below the atoms (or known elementary particles they are made of), there are no subelementary particles that can be heated up. So, there are no subelementary particles besides quarks, leptons and bosons. I do not know about strings.
Is it right logic? I ask because some ignorant people try to persuade me that atoms are like planetary systems themselves, which consist of more primitive particles, without any arguments for that and arrogantly call the quantum theory "idiotic".