SPM Form 4 Chemistry Chapter 2 KSSM – The Structure of Atoms Revision Notes The Particle Theory of MatterDiffusionDiffusion in SolidDiffusion in LiquidDiffusion in GasBrownian Motion Symbol of ElementElement and CompoundThree States of MatterInter-conversion between the States of MatterHeating CurveCooling CurveMelting Point, Boiling Point and the State of Matter2.3 Structure of AtomModern Atomic ModelThe Charge of ParticlesProton Number and Nucleon NumberIsotopesElectrons Arrangement in AtomValence Electron