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Refers to species that have only six electrons in the highest energy level of the central element (many Lewis acids).

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Basic Anhydride

The oxide of a metal that reacts with water to form a base.

Endothermic

Describes processes that absorb heat energy.

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.

Reaction Stoichiometry

Description of the quantitative relationships among substances as they participate in chemical reactions.

Amine

Derivatives of ammonia in which one or more hydrogen atoms have been replaced by organic groups.

Carbanion

An organic ion carrying a negative charge on a carbon atom.

Colligative Properties

Physical properties of solutions that depend upon the number but not the kind of solute particles present.

xylene

Any of three oily, colorless, water-insoluble, flammable, toxic, isomeric liquids, C8H10, of the benzene series, obtained mostly from coal tar: used chiefly in the manufacture of dyes.

Radioactive Dating

Method of dating ancient objects by determining the ratio of amounts of mother and daughter nuclides present in an object and relating the ratio to the object?s age via half-life calculations.

Overlap

The interaction of orbitals on different atoms in the same region of space.