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An Acid that can form two or more hydronium ions per molecule, often a least one step of ionization is weak.

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Geiger counter

A gas filled tube which discharges electriaclly when ionizing radiation passes through it.

Weak Electrolyte

A substance that conducts electricity poorly in a dilute aqueous solution.

Gangue

Sand, rock, and other impurities surrounding the mineral of interest in an ore.

Flotation

Method by which hydrophobic (water-repelling) particles of an ore are separated from hydrophilic (water-attracting) particles of a metallurgical pretreatment process.

Conduction Band

A partially filled band or a band of vacant energy levels just higher in energy than a filled band, a band within which, or into which, electrons must be promoted to allow electrical conduction to occur in a solid.

Neutron

A neutral subatomic particle having a mass of 1.0087 amu.

Downs Cell

Electrolytic cell for the commercial electrolysis of molten sodium chloride. For further information see Electrochemistry or Fuel Cells.

Carbonium ion

An orgainic ion carrying a positive charge on a carbon atom.

Ioniztion

The breaking up of a compound into separate ions.

Optical Isomers

Stereoisomers that differ only by being nonsuperimposable mirror images of each other, like right and left hands, also called enantiomers.