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The time required for half of a reactant to be converted into product(s). The time required for half of a given sample to undergo radioactive decay.

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Stereoisomers

Isomers that differ only in the way that atoms are oriented in space, consist of geometrical and optical isomers.

 

Heat of Crystallization

The amount of heat that must be removed from one gram of a liquid at its freezing point to freeze it with no change in temperature.

High Spin Complex

Crystal field designation for an outer orbital complex, all t2g and eg orbitals are singly occupied before any pairing occurs.

Noble Gases (Rare Gases)

Elements of the periodic Group 0, also called rare gases, formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.

Second Law of Thermodynamics

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

Coordinate Covalent Bond

A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.

Half-Cell

Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.

Oxidizing Agent

The substance that oxidizes another substance and is reduced.

Formula Weight

The mass of one formula unit of a substance in atomic mass units.