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The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.

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Band Theory of Metals

Theory that accounts for the bonding and properties of metallic solids.

Polarimeter

A device used to measure optical activity.

Mixture

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

Peroxide

A compound containing oxygen in the -1 oxidation state. Metal peroxides contain the peroxide ion, O22

Metal

An element below and to the left of the stepwise division (metalloids) in the upper right corner of the periodic table, about 80% of the known elements are metals.

Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Voltage

Potential difference between two electrodes, a measure of the chemical potential for a redox reaction to occur.

Ketone

Compound in which a carbonyl group is bound to two alkyl or two aryl groups, or to one alkyl and one aryl group.

Lewis Acid

Any species that can accept a share in an electron pair.

Binary Compound

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