At present, 6 leptons and 6 quarks are claiming the role of real elementary particles. They were called fundamental particles, which are understood as microparticles, the internal structure of which cannot be represented as a combination of other free particles. In common usage, physicists call elementary particles that are not atoms and atomic nuclei, with the exception of the proton and neutron.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.