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Quantum mechanical solution to a wave equation that designates the particular orbital within a given set (s, p, d, f ) in which a electron resides.

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Semiconductor

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

Actinides

Elements 89 to 103 (between lawrencium and actinium) on the periodic table. Only the first four have been found in nature in appreciable amounts. The remainder have been produced synthetically.

Stereoisomers

Isomers that differ only in the way that atoms are oriented in space, consist of geometrical and optical isomers.

 

Geiger counter

A gas filled tube which discharges electriaclly when ionizing radiation passes through it.

Where is ozone used?

Ozone is widely used in various areas of our life. It is used in medicine, in industry, in everyday life.

Substitution Reaction

A reaction in which an atom or a group of atoms is replaced by another atom or group of atoms.

Nonelectrolyte

A substance whose aqueous solutions do not conduct electricity.

Henry's Law

The pressure of the gas above a solution is proportional to the concentration of the gas in the solution.

Third Law of Thermodynamics

The entropy of a hypothetical pure, perfect, crystalline sustance at absolute zero temperature is zero.

Group

A vertical column in the periodic table, also called a family.