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AP Chem chapter one

AP chem chapter one vocabulary

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