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A colorless, crystalline compound, XeF6, that melts at 50°C to a yellow liquid, and boils at 75°C.

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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.

Photoelectric Effect

Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy, current increases with increasing intensity of radiation.

 

Polarization

The buildup of a product of oxidation or a reduction of an electrode, preventing further reaction.

Atomic Weight

Weighted average of the masses of the constituent isotopes of an element, The relative masses of atoms of different elements.

Film badge

A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.

Ionization Isomers

Isomers that result from the interchange of ions inside and outside the coordination sphere.

Deposition

The direct solidification of a vapor by cooling, the reverse of sublimation.

Standard Electrodes

Half-cells in which the oxidized and reduced forms of a species are present at unit activity, 1.0M solutions of dissolved ions, 1.0atm partial pressure of gases, and pure solids and liquids.

xenon

A heavy, colorless, chemically inactive, monatomic gaseous element used for filling radio, television, and luminescent tubes. Symbol: Xe, at. wt.: 131.30, at. no.: 54.

Primary Standard

A substance of a known high degree of purity that undergoes one invariable reaction with the other reactant of interest.