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A large molecule consisting of chains or rings of linked monomer units, usually characterized by high melting and boiling points.

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Frequency

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

Electroplating

Plating a metal onto a (cathodic) surface by electrolysis.

Nuclear Reaction

Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.

Band of Stability

Band containing nonradioactive nuclides in a plot of number of neutrons versus atomic number.

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.

Electron

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

pH

Negative logarithm of the concentration (mol/L) of the H3O+[H+] ion, scale is commonly used over a range 0 to 14.

Radioactive Tracer

A small amount of radioisotope replacing a nonradioactive isotope of the element in a compound whose path (for example, in the body) or whose decomposition products are to be monitored by detection of radioctivity, also called a radioactive label.

Hydrocarbons

Compounds that contain only carbon and hydrogen.

Dipole

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