Is Cosmic Matter Composition Complete ??? Convincing theoretical and observational evidence indicate that 5% of mass of the universe is made up protons, neutrons, and electrons (.05%). 25% of the mass is from dark matter. What is dark matter? Nobody is certain. 70% from dark energy of repulsive cosmological constant of general relativity which is really mass causing the antigravity force. Quantum mechanics only uses the 1st 5% of the stable mass to account the formation of ordinary atoms as shown by the periodic table of chemical elements. Why can't atoms of strange-charm quarks and muon leptons or top-bottom quarks and tau leptons be formed? Are these the source of dark matter? What is the source of cosmic rays? Are they mainly protons? Failures to answer these questions indicate strongly that our current theories are not complete hence not universally applicable.