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Periodic Table

TermDefinition
matter anything that has mass and takes up space; occurs as elements, compounds, and mixtures
atom a small particle of an element; made of electrons, protons, and neutrons
law of conservation of matter states that matter is not created or destroyed, it only changes form
electron negatively charged particles surrounding an atom
nucleus the positively charged central part of an atom
proton positively charged particles in the nucleus of an atom
neutron uncharged particles found in the nucleus of an atom
element matter made up of only one kind of atom
substance matter with the same composition and properties throughout; elements are substances
compound a substance whose smallest until is made up of atoms of more than one element
mixture formed when two or more substances come together but don't combine to make a new substance
crystal solid material who's atoms, molecules, or ions are arranged in an ordered pattern
molecule simplest unit of a chemical compound that can exist; formed when two or more atoms join together chemically
solid a state of matter with a definite volume and shape
pure substance a single substance, either an element or a compound, with definite composition and properties
isotope atoms of the same element with the same number of protons, but a different number of neutrons
Created by: MsHollinger