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

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Free Energy, Gibbs Free Energy

The thermodynamic state function of a system that indicates the amount of energy available for the system to do useful work at constant T and P.

Metallurgy

Refers to the overall processes by which metals are extracted from ores.

Alkynes

Unsaturated hydrocarbons that contain one or more carbon-carbon triple bonds.

Cathodic Protection

Protection of a metal (making ir a cathode) against corrosion by attaching it to a sacrifical anode of a more easily oxidized metal.

Sigma Bonds

Bonds resulting from the head-on overlap of atomic orbitals, in which the region of electron sharing is along and (cylindrically) symmetrical to the imaginary line connecting the bonded atoms.

Quantum Numbers

Numbers that describe the energies of electrons in atoms, derived from quantum mechanical treatment.

Potential Energy

Energy that matter possesses by virtue of its position, condition or composition.

Half-Reaction

Either the oxidation part or the reduction part of a redox reaction.

Natural Radioactivity

Spontaneous decomposition of an atom.

Radioactivity

The spontaneous disintegration of atomic nuclei.