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Hydrocarbons that contain only single bonds. They are also called alkanes or paraffin hydrocarbons.

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Extensive Property

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

Mass Number

The sum of the numbers of protons and neutrons in an atom, an integer.

Faraday's Law of Electrolysis

One equivalent weight of a substance is produced at each electrode during the passage of 96,487 coulombs of charge through an electrolytic cell.

Foam

Colloidal suspension of a gas in a liquid.

Molecular Formula

Formula that indicates the actual number of atoms present in a molecule of a molecular substance.

Solvent

The dispersing medium of a solution.

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.

Half-Cell

Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.

Reaction Quotient

The mass action expression under any set of conditions (not necessarily equlibrium), its magnitude relative to K determines the direction in which the reaction must occur to establish equilibrium.

Continuous Spectrum

Spectrum that contains all wave-lengths in a specified region of the electromagnetic spectrum.