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Refers to an optically active substance that rotates the plane of plane polarized light counterclockwise, also called levo.

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Ideal Gas

A hypothetical gas that obeys exactly all postulates of the kinetic-molecular theory.

 

xenon tetrafluoride

A colorless, crystalline compound, XeF4, prepared by heating a gaseous mixture of fluorine and xenon.

Band Theory of Metals

Theory that accounts for the bonding and properties of metallic solids.

Extensive Property

A property that depends upon the amount of material in a sample.

Element

A substance that cannot be decomposed into simpler substances by chemical means.

Covalent Bond

Chemical bond formed by the sharing of one or more electron pairs between two atoms.

Lone Pair

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

Coefficient of expansion

The ratio of the change in length or volumen of a body to the original lengthor volume for a unit change in temperature.

Nuclear Fission

The process in which a heavy nucleus splits into nuclei of intermediate masses and one or more protons are emitted.

Ground State

The lowest energy state or most stable state of an atom, molecule or ion.