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Covalent bond in which there is an unsymmetrical distribution of electron density.

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Lead Storage Battery

Secondary voltaic cell used in most automobiles.

Alums

Hydrated sulfates of the general formula M+M3+(SO4)2.12H2).

Bronsted-Lowry Base

A proton acceptor

Precipitate

An insoluble solid formed by mixing in solution the constituent ions of a slightly soluble solution.

Alpha (a) Particle

Helium ion with 2+ charge, an assembly of two protons and two neutrons.

Cathodic Protection

Protection of a metal (making ir a cathode) against corrosion by attaching it to a sacrifical anode of a more easily oxidized metal.

Saturated Solution

Solution in which no more solute will dissolve.

Collision Theory

Theory of reaction rates that states that effective collisions between reactant molecules must occur in order for the reaction to occur.

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.

Ketone

Compound in which a carbonyl group is bound to two alkyl or two aryl groups, or to one alkyl and one aryl group.