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A ligand atom whose electrons are shared with a Lewis acid.

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Unsaturated Hydrocarbons

Hydrocarbons that contain double or triple carbon-carbon bonds.

Oxidation Numbers

Arbitrary numbers that can be used as mechanical aids in writing formulas and balancing equations, for single- atom ions they correspond to the charge on the ion, more electronegative atoms are assigned negative oxidation numbers (also called Oxidation states).

Molecular Equation

Equation for a chemical reaction in which all formulas are written as if all substances existed as molecules, only complete formulas are used.

Molecule

The smallest particle of an element or compound capable of a stable, independent existence.

Cathode

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

Metathesis Reactions

Reactions in which two compounds react to form two new compounds, with no changes in oxidation number. Reactions in which the ions of two compounds exchange partners.

 

Enantiomer

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

Cis-

The prefix used to indicate that groups are located on the same side of a bon about which rotation is restricted.

Outer Orbital Complex

Valence bond designation for a complex in which the metal ion utilizes d orbitals in the outermost (occupied) shell in hybridization.

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.