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CHEM Exam I

Chapters 1-4 Chemistry

TermDefinition
physical change a change in the physical properties or a change in state without changing the composition
chemical change different substances are formed that have different properties and composition from the original material
Energy depends on __________. mass
potential energy stored energy; the energy an object possesses due to its position
kinetic energy the energy matter possesses as a result of its motion
SI unit for energy joule (j)
chemical properties describe the ability of a substance to interact with other substances to form new substances
physical properties inherent in the substance to interact with other substances without altering the composition of the substances
compound a substance that contains two or more elements
7 diatomic molecules H, N, O, F, Cl, Br, I
properties of nonmetals not lustrous, poor conductors of heat and electricity
properties of metals high luster, good conductors of heat and electricity, malleable
Chemical formulas are a combination of ____________. symbols
atom the smallest particle of an element
element a fundamental substance that cannot be broken down by chemical means to simpler substances
density mass divided by volume
heat the flow of energy due to a temperature difference
SI unit for temperature Kelvin (K)
matter hass mass, occupies space
theory an experiment producing consistent results over a long period of time verifies a theory
solids definite shape and volume, independent of container
liquids definite volume, not a definite shape
gas indefinite volume, no fixed shape, always fills the shape of the container
pure substance definite, fixed composition, is either an element or a compound
mixture combination of two or more substances
SI unit for volume liter (L), milliliter (mL)
SI unit for length meter (m)
SI unit for mass kilogram (kg)
Created by: sburdhimo
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