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A series of very closely spaced, nearly continuous molecular orbitals that belong to the crystal as a whole.

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Binary Acid

A binary compound in which H is bonded to one or more of the more electronegative nonmetals.

Molarity

Number of moles of solute per litre of solution.

Designated area

An area that may be used for work with carcinogens, reproductive toxins, or substances that have a high degree of acute toxicity. A designated area may be the entire laboratory, an area of a laboratory, or a device such as a laboratory hood.

Covalent Compounds

Compounds containing predominantly covalent bonds.

Lone Pair

Pair of electrons residing on one atom and not shared by other atoms, unshared pair.

Semiconductor

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

Equilibrium or Chemical Equilibrium

A state of dynamic balance in which the rates of forward and reverse reactions are equal, the state of a system when neither forward or reverse reaction is thermodynamically favored.

Amphiprotism

Ability of a substance to exhibit amphiprotism by accepting donated protons.

Partial Pressure

The pressure exerted by one gas in a mixture of gases.

Molecular Orbital

An orbit resulting from overlap and mixing of atomic orbitals on different atoms. An MO belongs to the molecule as a whole.