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Elements 58 to 71 (after lanthanum).

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Flux

A substance added to react with the charge, or a product of its reduction, in metallurgy, usually added to lower a melting point.

Common Ion Effect

Suppression of ionization of a weak electrolyte by the presence in the same solution of a strong electrolyte containing one of the same ions as the weak electrolyte.

Hydride

A binary compound of hydrogen.

 

Oil

Liquid triester of glycerol and unsaturated fatty acids.

Ampere

Unit of electrical current, one ampere equals one coulomb per second.

 

Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

Fractional Distillation

The process in which a fractioning column is used in distillation apparatus to separate components of a liquid mixture that have different boiling points.

Law of Definite Proportions (Law of Constant Composition)

The law stating that a pure substance will always have the same percent by weight. Different samples of a pure compound always contain the same elements in the same proportions by mass.

Chain Reaction

A reaction that, once initiated, sustains itself and expands. This is a reaction in which reactive species, such as radicals, are produced in more than one step. These reactive species, radicals, propagate the chain reaction.

 

Electron Deficient Compounds

Compounds that contain at least one atom (other than H) that shares fewer than eight electrons.