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Reactions in which oxidation and reduction occur, also called redox reactions.

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Active Metal

Metal with low ionization energy that loses electrons readily to form cations.

Coordination Sphere

The metal ion and its coordinating ligands but not any uncoordinated counter-ions.

Ionization Isomers

Isomers that result from the interchange of ions inside and outside the coordination sphere.

Oxidation Numbers

Arbitrary numbers that can be used as mechanical aids in writing formulas and balancing equations, for single- atom ions they correspond to the charge on the ion, more electronegative atoms are assigned negative oxidation numbers (also called Oxidation states).

Electrochemistry

Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.

Equivalent Weight

An oxidizing or reducing agent, who's mass gains (oxidizing agents) or loses (reducing agents) 6.022 x 1023 electrons in a redox reaction.
The mass of an acid or base that furnishes or reacts with 6.022 x 1023 H3O+ or OH- ions.

Periodic Table of Elements

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

Reactants

Substances consumed in a chemical reaction.

Ore

A natural deposit containing a mineral of an element to be extracted.