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

 

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Total Ionic Equation

Equation for a chemical reaction written to show the predominant form of all species in aqueous solution or in contact with water.

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.

Insulator

Poor electric and heat conductor.

Control Rods

Rods of materials such as cadmium or boron steel that act as neutron obsorbers (not merely moderaters) used in nuclear reactors to control neutron fluxes and therfore rates of fission.

Matter

Anything that has mass and occupies space.

Autoionization

An ionization reaction between identical molecules.

Hydrogen-Oxygen Fuel Cell

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

 

Dry Cells

Ordinary batteries (voltaic cells) for flashlights. radios, and so on, many are Leclanche cells.

K Capture

Absorption of a K shell (n=1) electron by a proton as it is converted to a neutron.

Radical

An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)