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Compound in which an oxygen atom is bonded to two alkyl or two aryl groups, or one alkyl and one aryl group.

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Gamma Ray

High energy electromagnetic radiation. A highly penetrating type of nuclear radiation similar to x-ray radiation, except that it comes from within the nucleus of an atom and has a higher energy. Energywise, very similar to cosmic ray except that cosmic rays originate from outer space.

Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

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.

Free Radical

A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.

Ionic Geometry

The arrangement of atoms (not lone pairs of electrons) about the central atom of a polyatomic ion.

Anode

In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.

Mass Deficiency

The amount of matter that would be converted into energy if an atom were formed from constituent particles.

Alloying

Mixing of metal with other substances (usually other metals) to modify its properties.

Le Chatelier's Principle

States that a system at equilibrium, or striving to attain equilibrium, responds in such a way as to counteract any stress placed upon it.
If a stress (change of conditions) is applied to a system at equilibrium, the system shifts in the direction that reduces stress.

Electrochemistry

Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.