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AP Chem chapter one
AP chem chapter one vocabulary
| Question | Answer |
|---|---|
| accuracy | agreement of a particular value with a true value |
| chemical change | change of substances into other substances through a reorganization of the atoms; a chemical reaction |
| chromatography | general name for a series of methods for separating mixtures by using a system with a mobile phase and a stationary phase |
| compound | substance with a constant composition that can be broken down into elements by chemical processes. |
| density | property of matter representing the mass per unit of volume |
| dimensional analysis | another term for unit factor method |
| distillation | method for separating components of a liquid mixture that depends on differences in the ease of vaporization of the components. |
| element | substance that cannot be decomposed into simpler substances by chemical or physical means. |
| exponential notation | expresses a number as N x 10^n a convenient method for representing very large or very small numbers and for easily indicating the number of significant figures. |
| filtration | method for separating componenets of mixtures containing a solid and a liquid |
| heterogeneous mixture | mixture having visibly distinguishable parts |
| homogeneous mixture | mixture having visibly indistinguishable parts. |
| hypothesis | one or more assumptions put forth to explain the observed behavior of nature. |
| law of conservation of mass | mass can not be created or destroyed |
| mass | quantity of matter in an object |
| matter | material of the universe |
| measurement | quantitative observation |
| model | another term for theory |
| natural law | statement that expresses generally observed behavior |
| paper chromatography | uses a strip of porous paper for the stationary phase |
| physical change | change in form of substance but not in chemical composition chemical bonds are not broken. |
| precision | degree of agreement among several measurements of the same quantity; reproducability of a measurement. |
| pure substance | substance with constant composition. |
| random error | an error that has equal probability of being high or low |
| scientific method | process of studying natural phenomena, involving observations, forming laws and theories, and testing theories by experimentation. |
| SI system | International System of Units based on the metric system and units derived from the metric system |
| significant figures | certain digits and first uncertain digits in measurements. |
| solution | a homogeneous mixture |
| states (of matter) | 3 different forms in which matter can exist; solid, liquid, and gas |
| systematic error | an error that always occurs in the same direction |
| theory | set of assumptions put forth to explain some aspect of observed behavior of matter |
| uncertainty | characteristic that any measurement involves estimates and cannot be exactly reproduced. |
| unit factor method | equivalence statement between units used for converting from one unit to another |
| weight | force exerted on an object by gravity. |
Created by:
mrsklann
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