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A heavy, colorless, chemically inactive, monatomic gaseous element used for filling radio, television, and luminescent tubes. Symbol: Xe, at. wt.: 131.30, at. no.: 54.

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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.

What are Compound Microscopes?

Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses.

The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is the stage, with the illuminator below that.

Distillate

The material in a distillation apparatus that is collected in the receiver.

 

Free Radical

A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.

Manometer

A two-armed barometer.

Dipole

Refers to the separation of charge between two covalently bonded atoms.

Anode

In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.

Coefficient of expansion

The ratio of the change in length or volumen of a body to the original lengthor volume for a unit change in temperature.

Structural Isomers

Compounds that contain the same number of the same kinds of atoms in different geometric arrangements.

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?