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

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Ampere

Unit of electrical current, one ampere equals one coulomb per second.

 

Metalloids

Elements with properties intermediate between metals and nonmetals: B, Al, Si, Ge, As, Sb, Te, Po, and At.

Electrodes

Surfaces upon which oxidation and reduction half-reactions, occur in electrochemical cells.

Aufbau ('building up') Principle

Describes the order in which electrons fill orbitals in atoms.

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.

Specific Heat

The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

Meniscus

The shape assumed by the surface of a liquid in a cylindrical container.

Amine

Derivatives of ammonia in which one or more hydrogen atoms have been replaced by organic groups.

Heat of Condensation

The amount of heat that must be removed from one gram of a vapor at it's condensation point to condense the vapour with no change in temperature.

Semiconductor

A substance that does not conduct electricity at low temperatures but does so at higher temperatures.