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

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Nickel-cadmium cell (Nicad battery)

A dry cell in which the anode is Cd, the cathode is NiO2, and the electrolyte is basic.

Ionic Compounds

Compounds containing predominantly ionic bonding.

Flash Point

The temperature at which a liquid will yield enough flamable vapour to ignite. There are various recognized industrial testing methods, therefore the method used must be stated.

Distilland

The material in a distillation apparatus that is to be distilled.

Condensed Phases

The liquid and solid phases, phases in which particles interact strongly.

Radiation

High energy particles or rays emitted during the nuclear decay processes.

Alkylbenzene

A compound containing an alkyl group bonded to a benzene ring.

Bond Order

Half the numbers of electrons in bonding orbitals minus half the number of electrons in antibonding orbitals. Bond order gives an indication to the stability of a bond. Also defined as the difference between the number of bonding electrons and antibonding electrons divided by two.

Eluant or eluent

The solvent used in the process of elution, as in liquid chromatography.

 

Heat

A form of energy that flows between two samples of matter because of their differences in temperature.