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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.

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Compound

A substance of two or more elements in fixed proportions. Compounds can be decomposed into their constituent elements.

Gem-dimethyl group

Two methyl groups of the same carbon atom.

Radioactive Tracer

A small amount of radioisotope replacing a nonradioactive isotope of the element in a compound whose path (for example, in the body) or whose decomposition products are to be monitored by detection of radioctivity, also called a radioactive label.

Addition Reaction

A reaction in which two atoms or groups of atoms are added to a molecule, one on each side of a double or triple bond. Types of addition reaction include electrophilic, nucleophilic (polar) and free radical addition (non-polar).

Cathode

Electrode at which reduction occurs in a cathode ray tube, the negative electrode.

Method of Initial Rates

Method of determining the rate-law expression by carrying out a reaction with different initial concentrations and analyzing the resultant changes in initial rates.

Coordination Isomers

Isomers involving exchanges of ligands between complex cation and complex anion of the same compound.

Yellowcake

The solid form of mixed uranium oxide, which is produced from uranium ore in the uranium recovery (milling) process.

Polymorphous

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

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.