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

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Critical Mass

The minimum mass of a particular fissionable nuclide in a given volume required to sustain a nuclear chain reaction.

Joule

A unit of energy in the SI system. One joule is 1 kg. m2/s2 which is also 0.2390 calorie.

Total Ionic Equation

Equation for a chemical reaction written to show the predominant form of all species in aqueous solution or in contact with water.

Diamonds Are Forever

Diamonds are still a girl's best friend, right? We love the shiny gems. They are the most popular rocks sold today. But what exactly are they, anyway? Where do they come from? What else are they used for?

Hydrate

A solid compound that contains a definite percentage of bound water.

Atom

The smallest particle of an element.

Solvolysis

The reaction of a substance with the solvent in which it is dissolved.

Pineapple literally "erodes" the tongue

Everyone who has ever tried fresh pineapple knows that if you eat too much, your lips and tongue hurt for a while. This is because the pineapple contains an enzyme called bromelain. This enzyme literally "erodes" the tongue.

Basic Anhydride

The oxide of a metal that reacts with water to form a base.

Electron

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.