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A nuclear reactor that produces more fissionable nuclear fuel than it consumes.

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Downs Cell

Electrolytic cell for the commercial electrolysis of molten sodium chloride. For further information see Electrochemistry or Fuel Cells.

Supercooled Liquids

Liquids that, when cooled, apparently solidify but actually continue to flow very slowly under the influence of gravity e.g glass.

Rate-determining Step

The slowest step in a mechanism, the step that determines the overall rate of reaction.

Standard Entropy

The absolute entropy of a substance in its standard state at 298 K.

Concentration

Amount of solute per unit volume or mass of solvent or of solution.

Inner Orbital Complex

Valence bond designation for a complex in which the metal ion utilizes d orbitals for one shell inside the outermost occupied shell in its hybridization.

xylan

The pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural.

Viscosity

Resistance offered by the molecules of a liquid to flow is termed as viscosity.

Total Ionic Equation

Equation for a chemical reaction written to show the predominant form of all species in aqueous solution or in contact with water.

Heterogeneous Catalyst

A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.