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Assumes that electron pairs are arranged around the central element of a molecule or polyatomic ion so that there is maximum separation (and minimum repulsion) among regions of high electron density.

 

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ytterbia

Ytterbia is a colorless compound, Yb2O3, used in certain alloys and ceramics. Also known as ytterbium oxide.

Activity of a component of ideal mixture

A dimensionless quantity whose magnitude is: equal to molar concentration in an ideal solution, equal to partial pressure in an ideal gas mixture, and defined as 1 for pure solids or liquids.

Tyndall Effect

The scattering of light by colloidal particles.

Anion

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

 

Bonding Pair

Pair of electrons involved in a covalent bond.

Emulsifying Agent

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

Chemical Periodicity

The variations in properties of elements with their position in the periodic table.

Nonelectrolyte

A substance whose aqueous solutions do not conduct electricity.

xylene

Any of three oily, colorless, water-insoluble, flammable, toxic, isomeric liquids, C8H10, of the benzene series, obtained mostly from coal tar: used chiefly in the manufacture of dyes.

Phase Diagram

Diagram that shows equilibrium temperature-pressure relationships for different phases of a substance.