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Molecule formed by combination of two smaller (identical) molecules.

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Ore

A natural deposit containing a mineral of an element to be extracted.

Metalloids

Elements with properties intermediate between metals and nonmetals: B, Al, Si, Ge, As, Sb, Te, Po, and At.

Hess' Law of Heat Summation

The enthalpy change for a reaction is the same whether it occurs in one step or a series of steps.

Photon

A packet of light or electromagnetic radiation, also called quantum of light.

 

Oil

Liquid triester of glycerol and unsaturated fatty acids.

Designated area

An area that may be used for work with carcinogens, reproductive toxins, or substances that have a high degree of acute toxicity. A designated area may be the entire laboratory, an area of a laboratory, or a device such as a laboratory hood.

Solvent

The dispersing medium of a solution.

Extensive Property

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

Sublimation

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

Formula Weight

The mass of one formula unit of a substance in atomic mass units.