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A gas filled tube which discharges electriaclly when ionizing radiation passes through it.

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Insoluble Compound

A very slightly soluble compound.

Coulometry

The quantitative application of Faraday's Law to the analysis of materials. The current and time are the usual variables measured.

Absorption Spectrum

Spectrum associated with absorption of electromagnetic radiation by atoms (or other species) resulting from transitions from lower to higher energy states. An absorption spectrum is the inverse of an emission spectrum.

Ferromagnetism

The ability of a substance to become permanently magnetized by exposure to an external magnetic field.

Crystal Field Theory

Theory of bonding in transition metal complexes in which ligands and metal ions are treated as point charges, a purely ionic model, ligand point charges represent the crystal (electrical) field perturbing the metal?s d orbitals containing nonbonding electrons.

Vapor

A gas formed by boiling or evaporating a liquid.

Common Ion Effect

Suppression of ionization of a weak electrolyte by the presence in the same solution of a strong electrolyte containing one of the same ions as the weak electrolyte.

Electronic Geometry

The geometric arrangement of orbitals containing the shared and unshared electron pairs surrounding the central atom of a molecule or polyatomic ion.

Percent Purity

The percent of a specified compound or element in an impure sample.

Temperature

A measure of the intensity of heat, i.e. the hotness or coldness of a sample. or object.