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An artificially induced nuclear reaction caused by the bombardment of a nucleus with subatomic particiles or small nucei.

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Group

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

Dissociation

In aqueous solution, the process in which a solid ionic compound separates into its ions.

Carcinogen

A substance capable of causing or producing cancer in mammals.

 

Equivalence Point

The point at which chemically equivalent amounts of reactants have reacted.

How to make crystal glass

From history we know that the idea of creating crystal belongs to the British: they were the first to add lead oxides to the charge material, and as a result got glass with unusual “voice”, transparency and sparkling faces. Classical crystal contains 24% of lead oxide, but there are products with a higher content of up to 30%.

Fractional Distillation

The process in which a fractioning column is used in distillation apparatus to separate components of a liquid mixture that have different boiling points.

Electrolysis

Process that occurs in electrolytic cells.

Law of Definite Proportions (Law of Constant Composition)

The law stating that a pure substance will always have the same percent by weight. Different samples of a pure compound always contain the same elements in the same proportions by mass.

Graham's Law

The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.

Molecule

The smallest particle of an element or compound capable of a stable, independent existence.