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A number that indicates how smoothly a gasoline burns.

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Reversible Reaction

Reactions that do not go to completion and occur in both the forward and reverse direction.

Heterocyclic Amine

Amine in which the nitrogen is part of a ring.

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.

Flammable

A liquid as defined by NFPD and DOT as having a flash point below 37.8°C (100°F).

Haber Process

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

Metallic Conduction

Conduction of electrical current through a metal or along a metallic surface.

Hydrocarbons

Compounds that contain only carbon and hydrogen.

Allotropic Modifications (Allotropes)

Different forms of the same element in the same physical state.

Isoelectric

Having the same electronic configurations.

Low Spin Complex

Crystal field designation for an inner orbital complex, contains electrons paired t2g orbitals before eg orbitals are occupied in octahedral complexes.