Chem Ch. 3 Key Terms

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Acid

Back 1

A compound that releases hydrogen ions when dissolved in water or donate H+ to another substance

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Base

Back 2

A substance that is capable of neutralizing an acid in a chemical reaction, forming water; a substance that accepts an H+ from another substance.

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Binary compound

Back 3

A compound containing atoms or ions of two elements

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Electrolyte

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A substance that dissociates or ionizes into aqueous ions upon dissolving and conducted electricity when dissolved in water.

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Formula unit

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The smallest repeating unit in an ionic compound

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Ionic compound

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A compound consisting of cations and anions in proportions that give electrical neutrality.

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Molecular compound

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A compound composed of two or more nonmetals and existing in discrete units of atoms held together in a molecule; electrons are shared between atoms rather than transferred from one atom to another.

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Molecular formula

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A formula that indicates the actual number of atoms present in a molecule

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Monatomic ion

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An ion of a single atom

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Nonelectrolyte

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A substance that retains its molecular identity upon dissolving and sites not conduct electricity when dissolved in water

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Oxoanion

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An anion containing oxygen attached to some other atom.

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Polyatomic ion

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An ion containing two or more atoms, such as SO4^2-

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Strong electrolyte

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A substance that dissociates or ionizes completely into ions upon dissolving and conducts electricity well.

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Weak electrolyte

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A substance that dissociates or ionizes partially into ions upon upon dissolving and conducts electricity to a slight extent.