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The mass of one formula unit of a substance in atomic mass units.

 

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Isotopes

Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

Electrical Conductivity

Ability to conduct electricity.

Electron

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

Electrolytic Cells

Electrochemical cells in which electrical energy causes nospontaneous redox reactions to occur. An electrochemical cell in which chemical reactions are forced to occur by the application of an outside source of electrical energy.

Standard Entropy

The absolute entropy of a substance in its standard state at 298 K.

Fat

Solid triester of glycerol and (mostly) saturated fatty acids.

Artificial Transmutation

An artificially induced nuclear reaction caused by the bombardment of a nucleus with subatomic particiles or small nucei.

Hydrogen-Oxygen Fuel Cell

Fuel cell in which hydrogen is the fuel (reducing agent) and oxygen is the oxidizing agent.

 

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.

Emulsion

Colloidal suspension of a liquid in a liquid.

Fractional Distillation

The process in which a fractioning column is used in distillation apparatus to separate components of a liquid mixture that have different boiling points.

Second Law of Thermodynamics

The universe tends toward a state of greater diorder in spontaneous processes.

Le Chatelier's Principle

States that a system at equilibrium, or striving to attain equilibrium, responds in such a way as to counteract any stress placed upon it.
If a stress (change of conditions) is applied to a system at equilibrium, the system shifts in the direction that reduces stress.

Partial Pressure

The pressure exerted by one gas in a mixture of gases.

Functional Group

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

Lanthanides

Elements 58 to 71 (after lanthanum).

Absorption Spectrum

Spectrum associated with absorption of electromagnetic radiation by atoms (or other species) resulting from transitions from lower to higher energy states. An absorption spectrum is the inverse of an emission spectrum.

Formula

Combination of symbols that indicates the chemical composition of a substance.

 

Enzyme

A protein that acts as a catalyst in biological systems.

Domain

A cluster of atoms in a ferromagnetic substance, all of which align in the same direction in the presence of an external magnetic field.