Topic C1: Particles; Definitions 0.0 / 5 ? ChemistryParticlesGCSEOCR Created by: MiriamLCreated on: 31-03-20 12:06 Solid Touching, orderes, vibrating around fixed position 1 of 31 Liquid Touching, random arrangement, moving around fixed position 2 of 31 Gas Spaced out, random arrangement, moving quickly in random directions 3 of 31 Chemical change two or more substances react to make a new product. Result is irreversible 4 of 31 Physical change reaction that is a change in state, reversible and no new product is formed 5 of 31 Sublimation Some solids change from solid to vapour without melting. Iodine, CO2 6 of 31 Freezing/solidification Liquid to solid at freezing point 7 of 31 Condensation/ liquefaction Vapour to liquid over range of temperatures 8 of 31 Melting Solid to liquid. Melting point and freezing point of a substance are the same 9 of 31 Evaporation Liquid to gas over a range of temperatures 10 of 31 Boiling Liquid to gas at a definite temperature (boiling point) 11 of 31 Density amount of mass in a volume 12 of 31 Tera 10^12 13 of 31 Giga 10^9 14 of 31 Mega 10^6 15 of 31 Kilo 10^3 16 of 31 Milli 10^-3 17 of 31 Micro 10^-6 18 of 31 Nano 10^-9 19 of 31 Pico 10^-12 20 of 31 Isotopes Atoms of the same element thathave same numbers of protons but different numbers of neutrons 21 of 31 Ions Atoms gain or lose electrons. If they lose they become positive, if they gain they become negative 22 of 31 Relative Atomic Mass Mean mass of an atom compared to 1/12 of the mass of carbon-12 23 of 31 Relative Formula Mass Addition of relative atomic masses of elements in a formula 24 of 31 Solute substance that dissolves 25 of 31 Solvent liquid in which solute dissolves 26 of 31 Saturated solution a solution in which nothing more will dissolve 27 of 31 Filtration separates insoluble substance from a solvent 28 of 31 Residue solid left behind in filter paper after filtration 29 of 31 Evaporation process during which a substance changes from liquid to gas 30 of 31 Solubility A measure of how much solute can dissolve in a solvent at a given temperature 31 of 31
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