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Any species that can make available a share in an electron pair.

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Semiconductor

A substance that does not conduct electricity at low temperatures but does so at higher temperatures.

Metallic Conduction

Conduction of electrical current through a metal or along a metallic surface.

Zone Refining

A method of purifying a bar of metal by passing it through an induction heater, this causes impurties to move along a melted portion. This method applies the fact when a metal crystallizes on cooling, impurities are automatically expelled as they do not form part of the crystal.

Contact Process

Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

Neutron

A neutral subatomic particle having a mass of 1.0087 amu.

Accuracy

How closely a measured value agrees with the correct value.

Net Ionic Equation

Equation that results from canceling spectator ions and eliminating brackets from a total ionic equation.

Hund's Rule

All orbitals of a given sublevel must be occupied by single electrons before pairing begins.

Thermal Cracking

Decomposition by heating a substance in the presence of a catalyst and in the absence of air.

 

Inert s-pair Effect

Characteristic of the post-transition minerals, tendency of the outermost s electrons to remain nonionized or un shared in compounds.