↩ 🔵 🔵 🔵 ❪✺❫ Quantum Concepts ○ ❪✺₄❫ Mechanical Sets ○ ❪✺_ₛₛ❫ Quantum Subsets ○ ❪◕❫ Elementary Particles ○ ❪◑❫ Subatomic Particles ○