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

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Emulsifying Agent

A sustance that coats the particles of the dispersed phase and prevents coagulation of colloidal particles, an emulsifier.

Alums

Hydrated sulfates of the general formula M+M3+(SO4)2.12H2).

Linear Accelerator

A device used for accelerating charged particles along a straight line path.

Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

Nonpolar Bond

Covalent bond in which electron density is symmetrically distributed.

Dubnium

Discovered : at both Berkeley, California, USA, and Dubna, near Moscow, Russia in 1970. Description:A highly radioactive metal which does not occur naturally, and of which only a few atoms have ever been made. It is of research interest only. Origin:The element is named after the Russian town of Dubna.

Mass Action Expression

For a reversible reaction, aA + bB cC + dD the product of the concentrations of the products (species on the right), each raised to the power that corresponds to its coefficient in the balanced chemical equation, divided by the product of the concentrations of reactants (species on the left), each raised to the power that corresponds to its coefficient in the balanced chemical equation. At equilibrium the mass action expression is equal to K, at other times it is Q.[C]c[D]d [A]a[B]b = Q, or at equilibrium K.

Denaturation

A process pertaining to a change in structure of a protein form regular to irregular arrangement of the polypeptide chains.

Donor Atom

A ligand atom whose electrons are shared with a Lewis acid.

Half-Cell

Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.