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A substance whose aqueous solutions do not conduct electricity.

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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.

Period

The elements in a horizontal row of the periodic table.

Atom

The smallest particle of an element.

Basic Salt

A salt containing an ionizable OH group.

Carbanion

An organic ion carrying a negative charge on a carbon atom.

Born-Haber Cycle

A series of reactions (and accompanying enthalpy changes) which, when summed, represents the hypothetical one-step reaction by which elements in their standard states are converted into crystals of ionic compounds (and the accompanying enthalpy changes.)

Boiling Point

The temperature at which the vapor pressure of a liquid is equal to the applied pressure, also the condensation point

Heteronuclear

Consisting of different elements.

Specific Gravity

The ratio of the density of a substance to the density of water.

Curie (Ci)

The basic unit used to describe the intensity of radioactivity in a sample of material. One curie equals 37 billion disintegrations per second or approximately the amount of radioactivty given off by 1 gram of radium.