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Any of six isomeric compounds that have the formula C8H11N, are derivatives of xylene, and resemble aniline: used in dye manufacture.

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Formal Charge

A method of counting electrons in a covalently bonded molecule or ion, counts bonding electrons as though they were equally shared between the two atoms.

Quantum Mechanics

Mathematical method of treating particles on the basis of quantum theory, which assumes that energy (of small particles) is not infinitely divisible.

Osmosis

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

 

Crystal Field Theory

Theory of bonding in transition metal complexes in which ligands and metal ions are treated as point charges, a purely ionic model, ligand point charges represent the crystal (electrical) field perturbing the metal?s d orbitals containing nonbonding electrons.

Stoichiometry

Description of the quantitative relationships among elements and compounds as they undergo chemical changes.

Ore

A natural deposit containing a mineral of an element to be extracted.

Ionization

In aqueous solution, the process in which a molecular compound reacts with water and forms ions.

Haber Process

A process for the catalyzed industrial production of ammonia from N2 and H2 at high temperature and pressure.

Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

Particulate Matter

Fine divided solid particles suspended in polluted air.