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A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.

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Atomic Radius

Radius of an atom.

Polyene

A compound that contains more than one double bond per molecule.

Sublimation

The direct vaporization of a sold by heating without passing through the liquid state.

Exothermicity

The release of heat by a system as a process occurs.

Double Bond

Covalent bond resulting from the sharing of four electrons (two pairs) between two atoms.

Extensive Property

A property that depends upon the amount of material in a sample.

Gangue

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

Differential Thermometer

A thermometer used for accurate measurement of very small changes in temperature.

Semiconductor

A substance that does not conduct electricity at low temperatures but does so at higher temperatures.

Saponification

Hydrolysis of esters in the presence of strong soluable bases.