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Ch 1 Chemisty part 2

Vocab Words

chemical bond The force that holds two atoms together.
molecule A particle made of two or more atoms bonded together.
compound A pure substance made of two or more elements chemically combined.
chemical formula A formula that gives the elements in a compound and the ratio of atoms.
mixture Two or more substances that are mixed together but not chemically combined.
heterogeneous mixture A mixture in which pure substances are unevenly distributed throughout the mixture.
homogeneous mixture A mixture in which substances are evenly distributed throughout the mixture.
solution An example of a homogeneous mixture; forms when substances dissolve.
weight A measure of the force of gravity on an object.
mass A measure of how much matter is in an object.
International System of Units The system of units (SI) used by scientists to measure the properties of matter.
volume The amount of space that matter occupies.
density The measurement of how much mass of a substance is contained in a given volume.
physical change A change in a substance that does not change its identity.
chemical change A change in which one or more substances combine or break apart to form new substances.
Created by: LudekingP