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One of the two mirror-image forms of an optically active molecule.

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Heteronuclear

Consisting of different elements.

Exothermicity

The release of heat by a system as a process occurs.

Miscibility

The ability of one liquid to mix with (dissolve in) another liquid.

Acid

A substance that produces H+(aq) ions in aqueous solution. Strong acids ionize completely or almost completely in dilute aqueous solution. Weak acids ionize only slightly. Chemicals or substances having the property of an acid are said to be acidic.

Dissociation

In aqueous solution, the process in which a solid ionic compound separates into its ions.

Forbidden Zone

A relatively large energy separation between an insulator's highest filled electron energy band and the next higher energy vacant band. Beginning in the fourth energy level, a set of seven degenerate orbitals per energy level, higher in energy than s, p, and d orbitals of the same energy level.

Single Bond

Covalent bond resulting from the sharing of two electrons (one pair) between two atoms.

Electronic Geometry

The geometric arrangement of orbitals containing the shared and unshared electron pairs surrounding the central atom of a molecule or polyatomic ion.

Manometer

A two-armed barometer.

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.