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The amount of matter that would be converted into energy if an atom were formed from constituent particles.

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Equivalent Weight

An oxidizing or reducing agent, who's mass gains (oxidizing agents) or loses (reducing agents) 6.022 x 1023 electrons in a redox reaction.
The mass of an acid or base that furnishes or reacts with 6.022 x 1023 H3O+ or OH- ions.

Electron

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.

Unsaturated Hydrocarbons

Hydrocarbons that contain double or triple carbon-carbon bonds.

Conjugate Acid-base Pair

In Bronsted-Lowry terminology, a reactant and product that differ by a proton, H+.

Amine

Derivatives of ammonia in which one or more hydrogen atoms have been replaced by organic groups.

Coulomb

Unit of electrical charge.

Saturated Solution

Solution in which no more solute will dissolve.

Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Fluorescence

Absorption of high energy radiation by a substance and subsequent emission of visible light.

Pairing Energy

Energy required to pair two electrons in the same orbital.