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Decomposition by heating a substance in the presence of a catalyst and in the absence of air.

 

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Nuclides

Refers to different atomic forms of all elements in contrast to ?isotopes?, which refer only to different atomic forms of a single element.

Atmosphere

A unit of pressure, the pressure that will support a column of mercury 760 mm high at 0 °C.

Canal Ray

Stream of positively charged particles (cations) that moves toward the negative electrode in cathode ray tubes, observed to pass through canals in the negative electrode.

Dilution

Process of reducing the concentration of a solute in solution, usually simply by mixing with more solvent.

Degenerate

Of the same energy.

pH

Negative logarithm of the concentration (mol/L) of the H3O+[H+] ion, scale is commonly used over a range 0 to 14.

Supercooled Liquids

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

Diamagnetism

Weak repulsion by a magnetic field.

Amide

Compound containing the O-C-N group.Compound that can be considered a derivative of ammonia in which one or more hydrogens are replaced by a alkyl or aryl groups.

 

Coulometry

The quantitative application of Faraday's Law to the analysis of materials. The current and time are the usual variables measured.

Pauli Exclusion Principle

No two electrons in the same atom may have identical sets of four quantum numbers.

Differential Scanning Calorimetry (DSC)

A technique for measuring the temperature, direction, and magnitude of thermal transitions in a sample material by heating/cooling and comparing the amount of energy required to maintain its rate of temperature increase or decrease with an inert reference material under similar conditions.

Chemical Kinetics

The study of rates and mechanisms of chemical reactions and of the factors on which they depend.

Foam

Colloidal suspension of a gas in a liquid.

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.

Electroplating

Plating a metal onto a (cathodic) surface by electrolysis.

Emission Spectrum

Spectrum associated with emission of electromagnetic radiation by atoms (or other species) resulting from electronic transitions from higher to lower energy states.

 

Polymorphous

Refers to substances that crystallize in more than one crystalline arrangement.

Electrical Conductivity

Ability to conduct electricity.

Molality

Concentration expressed as number of moles of solute per kilogram of solvent.