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

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Method of Initial Rates

Method of determining the rate-law expression by carrying out a reaction with different initial concentrations and analyzing the resultant changes in initial rates.

Ketone

Compound in which a carbonyl group is bound to two alkyl or two aryl groups, or to one alkyl and one aryl group.

Exothermic

Describes processes that release heat energy.

What are Compound Microscopes?

Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses.

The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is the stage, with the illuminator below that.

Matter

Anything that has mass and occupies space.

Electrodes

Surfaces upon which oxidation and reduction half-reactions, occur in electrochemical cells.

Insoluble Compound

A very slightly soluble compound.

Chain Termination Step

The combination of two radicals, which removes the reactive species that propagate the change reaction.

Silicones

Polymeric organosilicon compounds, contain individual or cross-linked Si-O chains or rings in which some oxygens of SiO4 tetrahedra are replaced by other groups.

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.