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Redox reactions in which the oxidizing agent and the reducing agent are the same species.

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Organic Chemistry

The chemistry of substances that contain carbon-hydrogen bonds.

Allotropic Modifications (Allotropes)

Different forms of the same element in the same physical state.

Chemical Equation

Description of a chemical reaction by placing the formulas of the reactants on the left and the formulas of products on the right of an arrow.

Hydride

A binary compound of hydrogen.

 

Displacement Reactions

Reactions in which one element displaces another from a compound.

 

Periodicity

Regular periodic variations of properties of elements with atomic number (and position in the periodic table).

Half-Reaction

Either the oxidation part or the reduction part of a redox reaction.

Ideal Gas Law

The product of pressure and the volume of an ideal gas is directly proportional to the number of moles of the gas and the absolute temperature.

Tetrahedral

A term used to describe molecules and polyatomic ions that have one atom in center and four atoms at the corners of a tetrahedron.

Thermonuclear Energy

The energy stored in the nucleus of an atom and released through fission, fusion, or radioactivity. In these processes a small amount of mass is converted to energy according to the relationship E = mc2, where E is energy, m is mass, and c is the speed of light.

Molecular Orbital

An orbit resulting from overlap and mixing of atomic orbitals on different atoms. An MO belongs to the molecule as a whole.

Alkyl Group

A group of atoms derived from an alkane by the removal of one hydrogen atom.

Molarity

Number of moles of solute per litre of solution.

Insulator

Poor electric and heat conductor.

Salicylate

A salt or ester of salicylic acid.

Heat of Fusion

The amount of heat required to melt one gram of solid at its melting point with no change in temperature. Usually expressed in J/g. The molar heat of fusion is the amount of heat required to melt one mole of a solid at its melting point with no change in temperature and is usually expressed in kJ/mol.

Third Law of Thermodynamics

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

Homologous Series

A series of compounds in which each member differs from the next by a specific number and kind of atoms.

Carbonium ion

An orgainic ion carrying a positive charge on a carbon atom.

Radiation

High energy particles or rays emitted during the nuclear decay processes.