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A process for the catalyzed industrial production of ammonia from N2 and H2 at high temperature and pressure.

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Square Planar Complex

Complex in which the metal is in the center of a square plane, with ligand donor atoms at each of the four corners.

Graham's Law

The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.

Salicylaldehyde

An oily, slightly water-soluble liquid, C7H6O2, having an almondlike odor: used chiefly in perfumery and in the synthesis of coumarin.

Alpha Particles

A helium nucleus.

Ionic Geometry

The arrangement of atoms (not lone pairs of electrons) about the central atom of a polyatomic ion.

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Complex Ions

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

Hydrolysis Constant

An equilibrium constant for a hydrolysis reaction.

Standard Molar Enthalphy of Formation

The amount of heat absorbed in the formation of one mole of a substance in a specified state from its elements in their standard states.