The periodic table of particles, akin to Mendeleiev's table, is still a developing concept with only three known generations of fundamental particles: leptons and quarks. Current scientific understanding lacks a satisfactory explanation for why these generations exist, and while some suggest these particles may be composite, there is no evidence to support this theory. Resources such as the SLAC and University of Sydney websites provide insights into the structure and classification of these particles. Despite ongoing research, the quest for a comprehensive understanding of particle generations remains challenging. The discussion highlights the complexity and evolving nature of particle physics.