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

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Particulate Matter

Fine divided solid particles suspended in polluted air.

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.

 

Disproportionation Reactions

Redox reactions in which the oxidizing agent and the reducing agent are the same species.

Colligative Properties

Physical properties of solutions that depend upon the number but not the kind of solute particles present.

Homonuclear

Consisting of only one element.

Diamagnetism

Weak repulsion by a magnetic field.

Partial Pressure

The pressure exerted by one gas in a mixture of gases.

Ioniztion

The breaking up of a compound into separate ions.

Avogadro's Law

At the same temperature and pressure, equal volumes of all gases contain the same number of molecules.

Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.