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Consisting of only one element.

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  • 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...

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    We breathe 24 hours a day, 7 days a week, consuming about 25 kg of air every day. It turns out that we practically predetermine our health by the air we breathe.

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    Calibration standards, performance audits, and the FDA's never-ending safety, labeling, and inspection requirements are just the tip of the iceberg when it comes to dealing with the increasingly stringent quality control standards of the beverage industry. As these quality standards become...

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    If you happen to break a rotten egg, then you know the smell of hydrogen sulfide, because the stench of the spoiled egg depends on of its presence in rotting protein substances.

  • 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?



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Radioactive Dating

Method of dating ancient objects by determining the ratio of amounts of mother and daughter nuclides present in an object and relating the ratio to the object?s age via half-life calculations.

Strong Electrolyte

A substance that conducts electricity well in a dilute aqueous solution.

 

Diamagnetism

Weak repulsion by a magnetic field.

Critical Pressure

The pressure required to liquefy a gas (vapor) at its critical temperature.

Miscibility

The ability of one liquid to mix with (dissolve in) another liquid.

Cation

A positive ion, an atom or group of atoms that has lost one or more electrons.

Fuel Cells

Voltaic cells in which the reactants (usually gases) are supplied continuously.
A voltaic cell that converts the chemical energy of a fuel and an oxidizing agent directly into electriacl energy on a continuous basis.

Molecular Formula

Formula that indicates the actual number of atoms present in a molecule of a molecular substance.

Sigma Orbital

Molecular orbital resulting from head-on overlap of two atomic orbitals.

Aryl Group

Group of atoms remaining after a hydrogen atom is removed from the aromatic system.