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The solute-like species in a colloid.

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Polarization

The buildup of a product of oxidation or a reduction of an electrode, preventing further reaction.

Delocalization

Of electrons, refers to bonding electrons that are distributed among more than two atoms that are bonded together, occurs in species that exhibit resonance.
The formation of a set of molecular orbitals that extend over more than two atoms, important in species that valence bond theory describes in terms of resonance.

Ionization Energy

The minimum amount of energy required to remove the most loosely held electron of an isolated gaseous atom or ion.

Activity Series

A listing of metals (and hydrogen) in order of decreasing activity.

Aufbau ('building up') Principle

Describes the order in which electrons fill orbitals in atoms.

Actual Yield

Amount of a specified pure product actually obtained from a given reaction. Compare with Theoretical Yield.

Metalloids

Elements with properties intermediate between metals and nonmetals: B, Al, Si, Ge, As, Sb, Te, Po, and At.

Carcinogen

A substance capable of causing or producing cancer in mammals.

 

Forbidden Zone

A relatively large energy separation between an insulator's highest filled electron energy band and the next higher energy vacant band. Beginning in the fourth energy level, a set of seven degenerate orbitals per energy level, higher in energy than s, p, and d orbitals of the same energy level.

Extensive Property

A property that depends upon the amount of material in a sample.