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At the same temperature and pressure, equal volumes of all gases contain the same number of molecules.

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Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Neutron

A neutral subatomic particle having a mass of 1.0087 amu.

Mass Action Expression

For a reversible reaction, aA + bB cC + dD the product of the concentrations of the products (species on the right), each raised to the power that corresponds to its coefficient in the balanced chemical equation, divided by the product of the concentrations of reactants (species on the left), each raised to the power that corresponds to its coefficient in the balanced chemical equation. At equilibrium the mass action expression is equal to K, at other times it is Q.[C]c[D]d [A]a[B]b = Q, or at equilibrium K.

Leclanche Cell

A common type of dry cell.

Alloying

Mixing of metal with other substances (usually other metals) to modify its properties.

Inner Orbital Complex

Valence bond designation for a complex in which the metal ion utilizes d orbitals for one shell inside the outermost occupied shell in its hybridization.

Nuclide Symbol

Symbol for an atom A/Z E, in which E is the symbol of an element, Z is its atomic number, and A is its mass number.

Beta Particle

Electron emitted from the nucleus when a neuton decays to a proton and an electron.

Acid Anhydride

Compound produced by dehydration of a carbonic acid. General formula is R--C--O--C--R. Chemical compound that reacts with water to form an acid and are usually oxides of nonmetallic elements.

Strong Electrolyte

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