SOLID, LIQUID, GAS, ATOM, MATTER, PHYSICAL CHANGE, CHEMICAL CHANGE, EVAPORATION, CONDENSATION, BOILING POINT, MELTING, FREEZING, SUBLIMATION, DEPOSITION, ELECTRON, PROTON, NEUTRON, POSITIVE, NEGATIVE, EUGEN GOLDSTEIN, JOSEPH JOHN THOMSON, DEMOCRITUS, JOHN DALTON, NIELS BOHR, ATOMIC MODEL,

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