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The number of repeating corresponding points on a wave that pass a given observation point per unit time.

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Boron Hydrides

Binary compounds of boron and hydrogen.

Exothermic

Describes processes that release heat energy.

Dynamic Equilibrium

An equilibrium in which processes occur continuously, with no net change. When two (or more) processes occur at the same rate so that no net change occurs.

Hydrolysis

The reaction of a substance with water or its ions.

Photon

A packet of light or electromagnetic radiation, also called quantum of light.

 

xanthate

A salt or ester of xanthic acid. Many xanthates have a yellow color. Xanthates are used as flotation agents in mineral processing.

Hydrometer

A device used to measure the densities of liquids and solutions.

Features of the Scanning Tunneling Microscope

The scanning tunneling microscope (STM) invented by Heinrich Rohrer and Gerd Binnig in the 1980s still manages to do a great job today and competes with more advanced microscope types.

The scanning tunneling microscope is used for studying the surface atoms that are found on various materials. The device is based on a complex process of "tunneling" electrons between the material and the tip of a probe.

Nonelectrolyte

A substance whose aqueous solutions do not conduct electricity.

Binding Energy (nuclear binding energy)

The energy equivalent (E = mc^2) of the mass deficiency of an atom.  where: E = is the energy in joules, m is the mass in kilograms, and c is the speed of light in m/s^2