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The rotation of plane polarized light by one of a pair of optical isomers.

 

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Valence Shell Electron Pair Repulsion Theory

Assumes that electron pairs are arranged around the central element of a molecule or polyatomic ion so that there is maximum separation (and minimum repulsion) among regions of high electron density.

 

Ternary Compound

A compound consisting of three elements, may be ionic or covalent.

Catalyst

A substance that speeds up a chemical reaction without being consumed itself in the reaction.
A substance that alters (usually increases) the rate at which a reaction occurs.

Activity of a component of ideal mixture

A dimensionless quantity whose magnitude is: equal to molar concentration in an ideal solution, equal to partial pressure in an ideal gas mixture, and defined as 1 for pure solids or liquids.

Chemical Change

A change in which one or more new substances are formed.

Alkali Metals

Metals of Group IA (Na, K, Rb).

Corrosion

Oxidation of metals in the presence of air and moisture.

Avogadro's Number

The number (6.022x10^23) of atoms, molecules or particles found in exactly 1 mole of substance.

Radiation

High energy particles or rays emitted during the nuclear decay processes.

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.