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Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.

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Neutron

A neutral subatomic particle having a mass of 1.0087 amu.

Ionic Compounds

Compounds containing predominantly ionic bonding.

Colligative Properties

Physical properties of solutions that depend upon the number but not the kind of solute particles present.

Reversible Reaction

Reactions that do not go to completion and occur in both the forward and reverse direction.

Vapor

A gas formed by boiling or evaporating a liquid.

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.

Heterocyclic Amine

Amine in which the nitrogen is part of a ring.

Electronic Geometry

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

Mother Nuclide

Nuclide that undergoes nuclear decay.

Levorotatory

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