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Very weak and very short-range attractive forces between short-lived temporary (induced) dipoles, also called dispersion Forces.

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Polar Bond

Covalent bond in which there is an unsymmetrical distribution of electron density.

Entropy

A thermodynamic state or property that measures the degree of disorder or randomness of a system.

Dumas Method

A method used to determine the molecular weights of volatile liquids.

Primary Voltaic Cells

Voltaic cells that cannot be recharged, no further chemical reaction is possible once the reactants are consumed.

Semiconductor

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

Heat of Condensation

The amount of heat that must be removed from one gram of a vapor at it's condensation point to condense the vapour with no change in temperature.

Polydentate

Refers to ligands with more than one donor atom.

Activity Series

A listing of metals (and hydrogen) in order of decreasing activity.

Biodegradability

The ability of a substance to be broken down into simpler substances by bacteria.

 

Dermal toxicity

Adverse health effects resulting from skin exposure ot a substance.