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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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Critical Pressure

The pressure required to liquefy a gas (vapor) at its critical temperature.

Electrophile

Positively charged or electron-deficient.

Spectrochemical Series

Arrangement of ligands in order of increasing ligand field strength.

Hydrogenation

The reaction in which hydrogen adds across a double or triple bond.

Electrodes

Surfaces upon which oxidation and reduction half-reactions, occur in electrochemical cells.

Half-Cell

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

Flux

A substance added to react with the charge, or a product of its reduction, in metallurgy, usually added to lower a melting point.

Allotropes

Different forms of the same element in the same physical state.

Conduction Band

A partially filled band or a band of vacant energy levels just higher in energy than a filled band, a band within which, or into which, electrons must be promoted to allow electrical conduction to occur in a solid.

Complex Ions

Ions resulting from the formation of coordinate covalent bonds between simple ions and other ions or molecules.