Karteikarten
Chemistry Keywords
Karten in diesem Stapel (36)
- 1neutralisation reactionbase + acid = neutral liquid
- 2displacement reactionwhen a stronger element displaces a weaker one
- 3combustion reactionburning something in oxygen
- 4metal + acid reactionalways results in hydrogen and a salt
- 5thermal decomposition reactionbreaking something down with heat
- 6precipitation reactionwhen a solid forms in a liquid
- 7reactantsthe substances before they react to each other
- 8productsthe substances produced after the reaction
- 9balanced equationan equation with an equal amount of substances on both sides of the arrow
- 10state symbolsused to represent states of matter
s = solid l = liquid g = gas aq = aqueous - 11elementmade up of atoms of one type (hydrogen)
- 12compoundcontains two or more different atoms chemically bonded together (carob dioxide)
- 13mixturecontains 2 or more substances mixed together (sand and water)
- 14atomsmallest particle that can exist on its own
- 15moleculea group of two or more atoms chemically bonded together
- 16isotopesdifferent atomic forms of the same element which have the same number of protons but different number of neutrons
- 17relative atomic massthe average mass of all atoms of that element
- 18relative abundancethe proportion of one isotope in an element
- 19endothermicenergy is transferred from surroundings to reactants. reactants become colder
- 20exothermicenergy transferred from reactants to surroundings. reactants become hotter
- 21isomerisomers have the same molecular formula but different spatial arrangement
- 22alkeneunsaturated hydrocarbons with one double bond
- 23activation energythe minimum energy needed to start a reaction
- 24catalystprovide an alternate reaction pathway, speeds up the rate of reaction without changing the contents or itself, lowers the activation energy
- 25hydrocarboncompound made up of only hydrogen and carbon
- 26homologous seriesa group of organic chemical compounds that have similar structure, listed in order of size
- 27viscosityquantity that describes a fluids resistance to flow
- 28volatileevaporates rapidly
- 29complete combustionwhen a fuel burns in air and makes carbon dioxide and water
- 30incomplete combustionwhen oxygen supply is poor so methane and soot (carbon) is produced
- 31crackingthe breaking up of long chain hydrocarbons into smaller, more useful compounds
- 32crude oila mixture of hydrocarbons made up of living things and burned to give energy (fossil fuel)
- 33fractional distillationthe process of separating constituents of a liquid mixture by heating it and condensing separately the components according to their boiling points
- 34independent variablethe part of a reaction that you change
- 35dependent variablethe part of a reaction that you measure
- 36control variablethe things you keep the same to make it a fair test
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- AQA Chemistry Keywords Flashcards
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