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The degree of polymerization, the average number of monomer units per polymer unit.

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Primary Standard

A substance of a known high degree of purity that undergoes one invariable reaction with the other reactant of interest.

Aromatic Hydrocarbons

Benzene and its derivatives.

Oxidation-reduction Reactions

Reactions in which oxidation and reduction occur, also called redox reactions.

Amphiprotism

Ability of a substance to exhibit amphiprotism by accepting donated protons.

Electron Deficient Compounds

Compounds that contain at least one atom (other than H) that shares fewer than eight electrons.

Diamonds Are Forever

Diamonds are still a girl's best friend, right? We love the shiny gems. They are the most popular rocks sold today. But what exactly are they, anyway? Where do they come from? What else are they used for?

Transition State Theory

Theory of reaction rates that states that reactants pass through high-energy transition states before forming products.

Nonbonding Orbital

A molecular orbital derived only from an atomic orbital of one atom, lends neither stability nor instability to a molecule or ion when populated with electrons.

Solvent

The dispersing medium of a solution.

Coordinate Covalent Bond

A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.