+A subatomic particle is a building block of matter and energy, vastly smaller than an [Atom](/wiki/atom). These fundamental constituents follow the laws of [Quantum Mechanics](/wiki/quantum_mechanics), revealing the universe's deepest structure.
+## See also
+- [Electron](/wiki/electron)
+- [Proton](/wiki/proton)
+- [Neutron](/wiki/neutron)
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