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Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

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Polymorphous

Refers to substances that crystallize in more than one crystalline arrangement.

Nonbonding Orbital

A molecular orbital derived only from an atomic orbital of one atom, lends neither stability nor instability to a molecule or ion when populated with electrons.

Coordination Isomers

Isomers involving exchanges of ligands between complex cation and complex anion of the same compound.

Heat of Vaporization

The amount of heat required to vaporize one gram of a liquid at its boiling point with no change in temperature. Usually expressed in J/g. The molar heat of vaporization is the amount of heat required to vaporize one mole of liquid at its boiling point with no change in temperature and usually expressed ion kJ/mol.

Radiation

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

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Aromatic Hydrocarbons

Benzene and its derivatives.

Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Percent by Mass

100% times the actual yield divided by theoretical yield.

Cyclotron

A device for accelerating charged particles along a spiral path.