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It is impossible to determine accurately both the momentum and position of an electron simultaneously.

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Group

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

Chemistry of the sky

Chemistry can teach us about the composition of celestial bodies and determine their age.

Solubility Product Principle

The solubility product constant expression for a slightly soluble compound is the product of the concentrations of the constituent ions, each raised to the power that corresponds to the number of ions in one formula unit.

Artificial Transmutation

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

Graham's Law

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

Colloid

A heterogeneous mixture in which solute-like particles do not settle out.

Electrolytic Cells

Electrochemical cells in which electrical energy causes nospontaneous redox reactions to occur. An electrochemical cell in which chemical reactions are forced to occur by the application of an outside source of electrical energy.

Electrophoresis

A technique for separation of ions by rate and direction of migration in an electric field.

Bond Energy

The amount of energy necessary to break one mole of bonds of a given kind (in gas phase).The amount of energy necessary to break one mole of bonds in a substance, dissociating the sustance in the gaseous state into atoms of its elements in the gaseous state.

Solution

Homogeneous mixture of two or more substances.