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element a substance that cannot be broken down into other substances by heat, light or electricity
periodic table a chart that classifies elements by their properties
atom the smallest particle of an element that has the properties of the element
nucleus the center of an atom, where protons and neutrons are located
proton particle in an atom that has positive charge
neutron particle in an atom that has no charge
electron particle in an atom that has a negative electrical charge
molecule two or more atoms joined together; the smallest unit of many substances
compound a substance made up of atoms of more than one element joined together in a molecule
mixture two or more substances that are mixed together, but can be separated out because their atoms are not combined
solution a mixture in which substances break up into their most basic particles, which are too small to be seen, and spread evenly through another substance
physical property a way of describing an object using traits that can be observed or measured without changing the substance into something else
physical change a change in one or more physical properties
chemical property describes the way a substance reacts with other substances
chemical change a change that produces new substances with new properites
chemical reaction a process that produces one or more substances that are different from the original substances
Created by: 824309374