chapter 6 and 7 test review

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14 Terms

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Element Symbol

Abbreviation of a chemical element - Ag= argentum

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Metals

lustrous, malleable, and ductile, conduct heat and electricity

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Non-Metals

Usually a gas or dull-powdery solid, do not conduct heat or electricity

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Metalloids

Have both metal and non-metal properties

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Groups of The Periodic Table

Organizes elements into periods (rows) and groups (columns)

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Isotopes

Atoms with the same amount of protons but different number of neutrons

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Mass Number, Atomic Number, Atomic Mass

key concepts in determining the composition of an atom

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Molecular element

Two or more atoms of the same or different elements that are chemically joined

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Chemical Formula

Notation indicating the type and number of atoms in a pure substance

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Molecular Compounds

Molecules consisting of atoms of different elements

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Ionic Compounds

Formed when metal and non-metal atoms combine to create ions

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Cations and Anions

Positively and negatively charged ions formed by metals and non-metals

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Atoms Combining

Process where atoms gain, lose, or share electrons to become stable

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Covalent Bond

Bond formed when two nonmetals share electrons to create a molecule.