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A substance whose aqueous solutions do not conduct electricity.

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Outer Orbital Complex

Valence bond designation for a complex in which the metal ion utilizes d orbitals in the outermost (occupied) shell in hybridization.

Pineapple literally "erodes" the tongue

Everyone who has ever tried fresh pineapple knows that if you eat too much, your lips and tongue hurt for a while. This is because the pineapple contains an enzyme called bromelain. This enzyme literally "erodes" the tongue.

Polymorphous

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

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Precipitate

An insoluble solid formed by mixing in solution the constituent ions of a slightly soluble solution.

Isomorphous

Refers to crystals having the same atomic arrangement.

Crystalline Solid

A solid characterized by a regular, ordered arrangement of particles.

Alcohol

Hydrocarbon derivative containing an --OH group attached to a carbon atom not in an aromatic ring. Alcohols are a class of organic compounds containing the hydroxyl group, OH, attached to a carbon atom.

Mixture

A sample of matter composed of two or more substances, each of which retains its identity and properties.

yttrium metal

Any of a subgroup of rare-earth elements, of which the cerium and terbium metals comprise the other two subgroups.