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Definitions (55)

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anode


An electrode at which oxidation occurs, producing free electrons that move to the cathode.
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ammeter


An instrument that measures electric current in amperes.
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atom


The smallest unit of an element, consisting of a dense, positively-charged nucleus surrounded by electrons.
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acid


A substance that produces hydrogen ions (H+) when it is dissolved in water.
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alternating current


An electric current that reverses direction at regular intervals. Abbreviated as AC.
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alloy


A homogeneous mixture of two or more metals, or of metallic and nonmetallic elements, usually fused together or dissolving into each other when molten, and producing a substance with metallic properties.
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base


A substance that produces hydroxide ions (OH–) when it is dissolved in water; ammonia (NH3) forms ammonium ions (NH4+) when it is dissolved in water.
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battery


One or more galvanic cells connected in series.
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cation


An ion or group of ions having a positive charge and characteristically moving toward the negative electrode in electrolysis.
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conductivity


The relative ability of a material to conduct electricity.
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