9SCIE: Elements, Compounds and Mixtures

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8 Terms

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Group

A vertical column of the periodic table, shows the number of valence electrons

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Period

A horizontal row of the periodic table, shows the number of electron shells

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Metals

Found on the left hand side of the periodic table

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Nonmetals

Found on the right hand side of the periodic table

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Element

A substance made of only one type of atom

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Compound

Two or more different elements chemically joined together

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Molecule

Two or more nonmetal atoms chemically joined together

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Mixture

Two or more substances that are not chemically joined and can be separated by physical methods