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Beginning in the third energy level, aset of five degenerate orbitals per energy level, higher in energy than s and p orbitals of the same energy level.

 

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Third Law of Thermodynamics

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

Ternary Compound

A compound consisting of three elements, may be ionic or covalent.

Binary Compound

A compound consisting of two elements, may be ionic or covalent.

Polar Bond

Covalent bond in which there is an unsymmetrical distribution of electron density.

Absorption Spectrum

Spectrum associated with absorption of electromagnetic radiation by atoms (or other species) resulting from transitions from lower to higher energy states. An absorption spectrum is the inverse of an emission spectrum.

Periodicity

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

Avogadro's Number

The number (6.022x10^23) of atoms, molecules or particles found in exactly 1 mole of substance.

Derivative

A compound that can be imagined to arise from a partent compound by replacement of one atom with another atom or group of atoms. Used extensively in orgainic chemistry to assist in identifying compounds.

Collision Theory

Theory of reaction rates that states that effective collisions between reactant molecules must occur in order for the reaction to occur.

Strong Electrolyte

A substance that conducts electricity well in a dilute aqueous solution.