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Any of six isomeric compounds that have the formula C8H11N, are derivatives of xylene, and resemble aniline: used in dye manufacture.

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Lanthanides

Elements 58 to 71 (after lanthanum).

Valence Shell Electron Pair Repulsion Theory

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.

 

Natural Radioactivity

Spontaneous decomposition of an atom.

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.

Molar Solubility

Number of moles of a solute that dissolve to produce a litre of saturated solution.

Acid Anhydride

Compound produced by dehydration of a carbonic acid. General formula is R--C--O--C--R. Chemical compound that reacts with water to form an acid and are usually oxides of nonmetallic elements.

Amorphous Solid

A noncrystalline solid with no well-defined ordered structure.

Leclanche Cell

A common type of dry cell.

Continuous Spectrum

Spectrum that contains all wave-lengths in a specified region of the electromagnetic spectrum.

Distilland

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