Gen Chem I Test Questions – Flashcards
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physical change |
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| A change that alters only the state or appearance of a substance but not its chemical composition |
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| chemical change |
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| A change that alters the molecular composition of a substance. |
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| matter |
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| Anything that occupies space and has mass |
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| solution |
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| A homogenous mixture of two subtances |
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| intensive property |
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| a property such as density that is independent of the amount of a given substance |
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| extensive property |
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| a property that depends on the amount of a given substance, such as mass. |
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| density |
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| the ratio of an objects mass to its volume |
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| mass |
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| a measure of the quantity of matter making up an object. |
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| volume |
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| a measure of space. any unit of length, when cubed becomes a unit of volume |
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| precision |
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| a term that refers to how lose a series of measurements are to one another or how reproducible they are. |
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| accuracy |
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| a term that refers to how close a measured value is to the actual value. |
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| element |
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| pure substance |
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| molecule |
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| compound |
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| mixture |
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| homogenous mixture |
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| heterogenous mixture |
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| electron |
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| proton |
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| neutron |
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| nucleus |
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| isotope |
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| mass number |
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atomic number
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| atom |
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| natural abundance |
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| atomic mass |
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| anode |
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| cathode |
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| period |
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| group or family |
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| alkali metal |
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| alkaline earth metal |
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halogens |
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| noble gases |
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| main group element |
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| transition elements |
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| metal |
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| nonmetal |
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| metalloid |
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| law of mass conservation |
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| law of definite proportion |
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| fraction by mass |
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| percent by mass |
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| law of multiple proportions |
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| ionic compounds |
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| cation |
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| anion |
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| halide ion |
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| oxanions |
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| molecular (covalent) compounds |
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| formula unit |
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| empirical formula |
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| molecular formula |
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| molar mass |
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| percent composition |
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| monatomic ion |
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| polyatomic ion |
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| reactant |
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| product |
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| chemical equation |
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| law of conservation of matter |
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| stoichiometry |
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| stoichiometric coefficient |
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| percent yield |
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| theoretical yield |
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| balanced equation |
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| balanced equation |
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| limiting reagent |
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| reactant in excess |
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