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Unsaturated hydrocarbons that contain one or more carbon-carbon double bonds.

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Electromagnetic Radiation

Energy that is propagated by means of electric and magnetic fields that oscillate in directions perpendicular to the direction of travel of the energy.

Explosive limits

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.

Radioactivity

The spontaneous disintegration of atomic nuclei.

Nuclear Reactor

A system in which controlled nuclear fisson reactions generate heat energy on a large scale, which is subsequently converted into electrical energy.

Distilland

The material in a distillation apparatus that is to be distilled.

Manometer

A two-armed barometer.

Kinetic-molecular Theory

A theory, that attempts to explain macroscopic observations on gases in microscopic observations on gases in microscopic observations on gases in microscopic or molecular terms.

Anion

A negative ion, an atom or goup of atoms that has gained one or more electrons.

 

Hydrate

A solid compound that contains a definite percentage of bound water.

Electronic Geometry

The geometric arrangement of orbitals containing the shared and unshared electron pairs surrounding the central atom of a molecule or polyatomic ion.