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MATTER Anything that has mass and occupies space
ELEMENT A substance composed of a single kind of atom that cannot be broken down into other substances by chemical physical means
PERIODIC TABLE An organized table of all the known elements
ATOMIC NUMBER The number of protons or electrons in an element
ATOMIC SYMBOL An abbreviation for the element name
ATOMIC MASS the mass of protons + neutrons (also called atomic weight or mass number)
COMPOUND A substance in which 2 or more elements are chemical joined in a set ratio
MIXTURE 2 or more substances that are mixed together but not chemically combined
ATOM the smallest unit of an element that retains (or keeps) the properties of that element
NUCLEUS the central core of an atom that contains the protons and neutrons
PROTON small, positively charged particle in the nucleus of an atom
NEUTRON small, uncharged particle in the nucleus of an atom
ELECTRON a tiny negatively charged high energy particle that moves in the space around the nucleus of an atom
ELECTRON SHELLS fixed orbit or path that electrons travel in around the nucleus
MOLECULE 2 or more atoms that are bonded together
CHEMICAL BOND the force that holds 2 or more atoms together
Created by: JG3126911