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

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Semiconductor

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

Metalloids

Elements with properties intermediate between metals and nonmetals: B, Al, Si, Ge, As, Sb, Te, Po, and At.

Oxidation

An algebraic increase in the oxidation number, may correspond to a loss of electrons.

Specific Gravity

The ratio of the density of a substance to the density of water.

Standard Molar Volume

The volume occupied by one mole of an ideal gas under standard conditions, 22.4liters.

Polyene

A compound that contains more than one double bond per molecule.

Breeder Reactor

A nuclear reactor that produces more fissionable nuclear fuel than it consumes.

Effective Molality

The sum of the molalities of all solute particles in a solution.

Alkyl Group

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

Equilibrium Constant

A quantity that characterizes the position of equilibrium for a reversible reaction, its magnitude is equal to the mass action expression at equilibrium. K varies with temperature.