Chemistry Concepts

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Covalent Bond

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A bond in which electrons are shared between the bonded atoms.

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Covalent Compound

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Any compound resulting from covalent bonding.

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Ionic Bond

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The force of attraction between a charged atom (or group of connected atoms) and another with the opposite charge.

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Ionic Compound

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Any compound resulting from ionic bonding.

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Polymer

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A molecule consisting of repeating chemical units.

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Valence Electrons

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The electrons in the outermost shell of an atom.

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Catalyst

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A substance present during a chemical reaction that speeds up the reaction but is not used up or changed during the reaction.

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Equilibrium

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The state of a chemical system in which the rates of the forward and reverse reactions are equal.

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Reaction Rate

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How quickly a specific chemical reaction occurs under specific conditions over time.

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Combustion Reaction

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An exothermic reaction in which oxides are usually formed.