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Method of dating ancient objects by determining the ratio of amounts of mother and daughter nuclides present in an object and relating the ratio to the object?s age via half-life calculations.

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Basic Salt

A salt containing an ionizable OH group.

Half-Cell

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

Tetrahedral

A term used to describe molecules and polyatomic ions that have one atom in center and four atoms at the corners of a tetrahedron.

Condensed Phases

The liquid and solid phases, phases in which particles interact strongly.

Foam

Colloidal suspension of a gas in a liquid.

Electronic Transition

The transfer of an electron from one energy level to another.

xenon trioxide

A colorless, nonvolatile solid, XeO3, explosive when dry: in solution it is called xenic acid.

Periodic Table

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

Emulsifying Agent

A sustance that coats the particles of the dispersed phase and prevents coagulation of colloidal particles, an emulsifier.

Heat of Crystallization

The amount of heat that must be removed from one gram of a liquid at its freezing point to freeze it with no change in temperature.