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Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.

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Basic Anhydride

The oxide of a metal that reacts with water to form a base.

Electrophoresis

A technique for separation of ions by rate and direction of migration in an electric field.

Polymorphous

Refers to substances that crystallize in more than one crystalline arrangement.

Nitrogenases

A class of enzymes found in bacteria within root nodules in some plants, which catalyze reactions by which N2 molecules from the air are converted to ammonia.

 

Shielding Effect

Electrons in filled sets of s , p orbitals between the nucleus and outer shell electrons shield the outer shell electrons somewhat from the effect of protons in the nucleus, also called screening effect.

Ampere

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

 

Atomic Radius

Radius of an atom.

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Electronegativity

A measure of the relative tendency of an atom to attract electrons to itself when chemically combined with another atom.

Reducing Agent

The substance that reduces another substance and is oxidized.