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A salt containing an ionizable OH group.

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Coefficient of expansion

The ratio of the change in length or volumen of a body to the original lengthor volume for a unit change in temperature.

Chemistry of the sky

Chemistry can teach us about the composition of celestial bodies and determine their age.

xanthate

A salt or ester of xanthic acid. Many xanthates have a yellow color. Xanthates are used as flotation agents in mineral processing.

Canal Ray

Stream of positively charged particles (cations) that moves toward the negative electrode in cathode ray tubes, observed to pass through canals in the negative electrode.

Weak Field Ligand

A Ligand that exerts a weak crystal or ligand field and ge- nerally forms high spin complexes with metals.

xanthene dye

Any of a group of dyes having a molecular structure related to that of xanthene in which the aromatic (C6H4) groups are the chromophore.

 

Ion

An atom or a group of atoms that carries an electric charge.

Hard Water

Water containing Fe3+, Ca2+, and Mg2+ ions, which forms precipates with soap.

Polymorphous

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

Radical

An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)