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Theory of reaction rates that states that effective collisions between reactant molecules must occur in order for the reaction to occur.

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Bronsted-Lowry Base

A proton acceptor

Moderator

A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.

Extensive Property

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

Substitution Reaction

A reaction in which an atom or a group of atoms is replaced by another atom or group of atoms.

Foam

Colloidal suspension of a gas in a liquid.

Vapor

A gas formed by boiling or evaporating a liquid.

Weak Field Ligand

A Ligand that exerts a weak crystal or ligand field and ge- nerally forms high spin complexes with metals.

Crystal Lattice

A pattern of arrangement of particles in a crystal.

Energy

The capacity to do work or transfer heat.

Denaturation

A process pertaining to a change in structure of a protein form regular to irregular arrangement of the polypeptide chains.