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The material in a distillation apparatus that is collected in the receiver.

 

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Fluorescence

Absorption of high energy radiation by a substance and subsequent emission of visible light.

Supercritical Fluid

A substance at temperature above its critical temperature.

Amine

Derivatives of ammonia in which one or more hydrogen atoms have been replaced by organic groups.

Free Energy Change

The indicator of spontaneity of a process at constnt T and P. If delta-G is negative, the process is spontaneous.

Voltaic Cells

Electrochemical cells in which spontaneous chemical reactions produce electricity, also called galvanic cells.

 

Lewis Acid

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

Graham's Law

The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.

Intermolecular Forces

Forces between individual particles (atoms, molecules, ions) of a substance.

20 interesting chemistry facts

20 interesting chemistry facts.

Actinides

Elements 89 to 103 (between lawrencium and actinium) on the periodic table. Only the first four have been found in nature in appreciable amounts. The remainder have been produced synthetically.