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Compounds containing predominantly ionic bonding.

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Endothermicity

The absorption of heat by a system as the process occurs.

Nodal Plane

A region in which the probability of finding an electron is zero.

 

Solubility Product Constant

Equilibrium constant that applies to the dissolution of a slightly soluble compound.

Degenerate

Of the same energy.

Ester

A Compound of the general formula R-C-O-R1 where R and R1 may be the same or different, and may be either aliphatic or aromatic.

Half-Life

The time required for half of a reactant to be converted into product(s). The time required for half of a given sample to undergo radioactive decay.

Eluant or eluent

The solvent used in the process of elution, as in liquid chromatography.

 

Primary Standard

A substance of a known high degree of purity that undergoes one invariable reaction with the other reactant of interest.

Molecular Geometry

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

Double Salt

Solid consisting of two co-crystallized salts.