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A nuclear reactor that produces more fissionable nuclear fuel than it consumes.

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Levorotatory

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

Oxidizing Agent

The substance that oxidizes another substance and is reduced.

Alums

Hydrated sulfates of the general formula M+M3+(SO4)2.12H2).

Period

The elements in a horizontal row of the periodic table.

Acyl Group

Compound derived from a carbonic acid by replacing the --OH group with a halogen (X), usually --Cl, general formula is O R--C--X.

Neutralization

The reaction of an acid with a base to form a salt and water. Usually, the reaction of hydrogen ions with hydrogen ions to form water molecules.

Halogens

Group VIIA elements: F, Cl, Br, I

Chain Termination Step

The combination of two radicals, which removes the reactive species that propagate the change reaction.

Molecular Geometry

The arrangement of atoms (not lone pairs of electrons) around a central atom of a molecule or polyatomic ion.

Functional Group

A group of atoms that represents a potential reaction site in an organic compound.