Basic Chemistry Terms

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Chemical bond

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An attraction between atoms that allows the formation of chemical substances containing two or more atoms.

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Electronegativity

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A measure of the tendency of an atom to attract a bonding pair of electrons.

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Octet rule

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States that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons

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Ionic compound

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A compound that consists of positive and negative ions

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Ionic bond

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Formed when one or more electrons are transferred from one atom to another

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Ion

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An atom or group of atoms that has a positive or negative charge.

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Cation

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A positively charged ion

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Anion

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A negatively charged ion.

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Polyatomic ion

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A charged chemical species (ion) composed of two or more atoms covalently bonded.