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The number of moles of a component of a mixture divided by the total number of moles in the mixture.

 

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Isomers

Different substances that have the same formula.

Homologous Series

A series of compounds in which each member differs from the next by a specific number and kind of atoms.

Heterocyclic Amine

Amine in which the nitrogen is part of a ring.

Film badge

A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.

Ion

An atom or a group of atoms that carries an electric charge.

Molarity

Number of moles of solute per litre of solution.

Henry's Law

The pressure of the gas above a solution is proportional to the concentration of the gas in the solution.

Radical

An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)

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.

Organic Chemistry

The chemistry of substances that contain carbon-hydrogen bonds.