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

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Coulomb

Unit of electrical charge.

Ionization Energy

The minimum amount of energy required to remove the most loosely held electron of an isolated gaseous atom or ion.

Dispersed Phase

The solute-like species in a colloid.

Molecular Geometry

The arrangement of atoms (not lone pairs of electrons) around a central atom of a molecule or polyatomic ion.

Enantiomer

One of the two mirror-image forms of an optically active molecule.

Ketone

Compound in which a carbonyl group is bound to two alkyl or two aryl groups, or to one alkyl and one aryl group.

Electrolyte

A substance whose aqueous solutions conduct electricity.

 

xenon tetrafluoride

A colorless, crystalline compound, XeF4, prepared by heating a gaseous mixture of fluorine and xenon.

Lanthanide Contraction

A decrease in the radii of the elements following the lanthanides compared to what would be expected if there were no f-transition metals.

Band of Stability

Band containing nonradioactive nuclides in a plot of number of neutrons versus atomic number.