mass number - this number is the total of proton and neutron in atom, period - the row on the perioidic table, filtration - the technique used to separate sand from water, melting - the change of state from a solid to a liquid, S - Sulfur, malleable - how easily a solid metal can be bent without being broken, solid - the state of substance that particles are close together in fixed position, Potassium - K, the type of substance that is made up of by 1 type of atom1 type of - element, density - is determined by mass of the object divided by the volume, sublimation - dry ice directly becomes to the carbon dioxide gas, proton - the sub particle in an atom which has positive charge, this number equals to the number of proton in an atom - atomic number, condensation - the change of state when water vapor turns back to water, energy shells (electron shells) - the round circles that outside the nucleus of an atom, the type of substance, e.g., lemonade soda juice - mixture, oxygen gas - a molecule, Sodium chloride - a compound, copper - the metal that is commonly used as electrical wires, Cl - Chlorine,

Year 9 Chemistry Revision

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