Valence Electron - An electron in the outer shell associated with an atom, and that can participate in the formation of a chemical bond, Ion - An atom or molecule with a net electric charge due to the loss or gain of one or more electrons, Cation - An ion that is positively charged, Anion - An ion that is negatively charged, Element - Substances that are made up of only one kind of atom, Compound - Substances that are made up of more than one type of atom, Metal - Good conductors of heat and electricity, malleable, and ductile, Nonmetal - Poor conductors of heat and electricity, and are not malleable or ductile, Metalloids - Possess characteristics of both metals and nonmetals, Oxidation number - Total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom,

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