Atom - Smallest unit of matter, Molecule - Two or more atoms bonded, Element - Pure substance, one type atom, Compound - Two or more elements combined, Mixture - Physically combined substances, Ionic Bond - Transfer of electrons, Covalent Bond - Sharing of electrons, Metallic Bond - Sea of electrons, Periodic Table - Arrangement of elements, Acid - Proton donor, Base - Proton acceptor, pH Scale - Measures acidity or alkalinity, Oxidation - Loss of electrons, Reduction - Gain of electrons, Electrolysis - Decomposition by electricity, Exothermic Reaction - Releases heat, Endothermic Reaction - Absorbs heat, Catalyst - Speeds up reaction, Molar Mass - Mass of one mole, Avogadro's Number - 6.022 x 10^23 particles,

IGCSE Chemistry 0620 Keywords

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