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Elements 58 to 71 (after lanthanum).

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Specific Rate Constant

An experimentally determined (proportionality) constant, which is different for different reactions and which changes only with temperature, k in the rate-law expression: Rate = k [A] x [B]v.

Electrolysis

Process that occurs in electrolytic cells.

Metathesis Reactions

Reactions in which two compounds react to form two new compounds, with no changes in oxidation number. Reactions in which the ions of two compounds exchange partners.

 

Adsorption

Adhesion of a species onto the surfaces of particles.

Galvanizing

Placing a thin layer of zinc on a ferrous material to protect the underlying surface from corrosion.

 

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.

Isotopes

Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

Second Law of Thermodynamics

The universe tends toward a state of greater diorder in spontaneous processes.

Conduction Band

A partially filled band or a band of vacant energy levels just higher in energy than a filled band, a band within which, or into which, electrons must be promoted to allow electrical conduction to occur in a solid.

Dosimeter

A small, calibrated electroscope worn by laboratory personnel and designated to detect and measure incident ionizing radiation or chemical exposure.

Addition Reaction

A reaction in which two atoms or groups of atoms are added to a molecule, one on each side of a double or triple bond. Types of addition reaction include electrophilic, nucleophilic (polar) and free radical addition (non-polar).

Low Spin Complex

Crystal field designation for an inner orbital complex, contains electrons paired t2g orbitals before eg orbitals are occupied in octahedral complexes.

Reaction Ratio

The relative amounts of reactants and products involved in a reaction, maybe the ratio of moles. millimoles, or masses.

 

Free Radical

A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.

Complex Ions

Ions resulting from the formation of coordinate covalent bonds between simple ions and other ions or molecules.

Electrochemistry

Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.

Atom

The smallest particle of an element.

Associated Ions

Short-lived species formed by the collision of dissolved ions of opposite charges.

Secondary Standard

A solution that has been titrated against a primary standard. A standard solution is a secondary standard.

 

Henry's Law

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