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Description of the quantitative relationships among substances as they participate in chemical reactions.

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Bonding Orbital

A molecular orbit lower in energy than any of the atomic orbitals from which it is derived, lends stability to a molecule or ion when populated with electron.

Equilibrium Constant

A quantity that characterizes the position of equilibrium for a reversible reaction, its magnitude is equal to the mass action expression at equilibrium. K varies with temperature.

Periodic Table

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

Lead Storage Battery

Secondary voltaic cell used in most automobiles.

Semipermable Membrane

A thin partition between two solutions through which certain molecules can pass but others cannot.

Electrophile

Positively charged or electron-deficient.

Gel

Colloidal suspension of a solid dispersed in a liquid, a semirigid solid.

Photoelectric Effect

Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy, current increases with increasing intensity of radiation.

 

Lewis Acid

Any species that can accept a share in an electron pair.

xylic acid

Any of six colorless, crystalline, isomeric acids having the formula C9H10O2, derived from xylene.