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Elements with properties intermediate between metals and nonmetals: B, Al, Si, Ge, As, Sb, Te, Po, and At.

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Saponification

Hydrolysis of esters in the presence of strong soluable bases.

Semipermable Membrane

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

Isoelectric

Having the same electronic configurations.

Alkylbenzene

A compound containing an alkyl group bonded to a benzene ring.

Debye

The unit used to express dipole moments.

Lone Pair

Pair of electrons residing on one atom and not shared by other atoms, unshared pair.

Ionization

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

History of diamonds

Diamond has been known for about 5 thousand years. Historians suggest that it was first discovered in India in river placers. It has long been credited with magical properties, and the largest famous crystals and products from them are shrouded in a halo of mystical legends.

Conduction Band

A partially filled band or a band of vacant energy levels just higher in energy than a filled band, a band within which, or into which, electrons must be promoted to allow electrical conduction to occur in a solid.

Metalloids

Elements with properties intermediate between metals and nonmetals: B, Al, Si, Ge, As, Sb, Te, Po, and At.