ELEMENTS, A substance that cannot be broken down into simpler substances by chemical means and consists of only one type of atom., METALS, Elements that are typically lustrous, malleable, ductile, and good conductors of heat and electricity., NON-METALS, Elements that are often poor conductors, and can be solid, liquid, or gas at room temperature, METALLOIDS, A chemical element with properties intermediate between those of metals and nonmetals, often acting as semiconductors., FAMILY/GROUP, A vertical column of elements that share similar chemical properties., PERIOD, A horizontal row of chemical elements that have the same number of electron shells..

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