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A packet of light or electromagnetic radiation, also called quantum of light.

 

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Hydration Energy

The energy change accompanying the hydration of a mole of gase and ions.

Metallurgy

Refers to the overall processes by which metals are extracted from ores.

Endothermic

Describes processes that absorb heat energy.

xylidine

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

Bronsted-Lowry Acid

A proton donor.

Contact Process

Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

Covalent Bond

Chemical bond formed by the sharing of one or more electron pairs between two atoms.

Molecular Geometry

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

Dilution

Process of reducing the concentration of a solute in solution, usually simply by mixing with more solvent.

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.