Term | Definition |
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) |