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An Acid that can form two or more hydronium ions per molecule, often a least one step of ionization is weak.

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Oxide

A binary compound of oxygen.

Carcinogen

A substance capable of causing or producing cancer in mammals.

 

Noble Gases (Rare Gases)

Elements of the periodic Group 0, also called rare gases, formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.

Isoelectric

Having the same electronic configurations.

Entropy

A thermodynamic state or property that measures the degree of disorder or randomness of a system.

Effective Nuclear Charge

The nuclear charge experienced by the outermost electrons of an atom, the actual nuclear charge minus the effects of shielding due to inner-shell electrons.
Example: Set of dx2-y2 and dz2 orbitals, those d orbitals within a set with lobes directed along the x-, y-, and z-axes.

Eluate

Solvent (or mobile phase) which passes through a chromatographic column and removes the sample components from the stationary phase.

Alloying

Mixing of metal with other substances (usually other metals) to modify its properties.

Aromatic Hydrocarbons

Benzene and its derivatives.

Osmosis

The process by which solvent molecules pass through a semipermable membrane from a dilute solution into a more concentrated solution.