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Covalent bond in which there is an unsymmetrical distribution of electron density.

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Alkaline Battery

A dry cell in which the electrolyte contains KOH.

Contact Process

Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

Extrapolate

To estimate the value of a result outside the range of a series of known values. Technique used in standard additions calibration procedure.

Polymerization

The combination of many small molecules to form large molecules.

Why do copper products change color, and what is the name of the process?

Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.

Photon

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

 

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.

Peroxide

A compound containing oxygen in the -1 oxidation state. Metal peroxides contain the peroxide ion, O22

Associated Ions

Short-lived species formed by the collision of dissolved ions of opposite charges.

Endothermicity

The absorption of heat by a system as the process occurs.