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Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances

Atom

The smallest particle of an element.

Octahedral

A term used to describe molecules and polyatomic ions that have one atom in the center and six atoms at the corners of a octahedron.

Heterogeneous Equilibria

Equilibria involving species in more than one phase.

Nuclear Binding Energy

Energy equivalent of the mass deficiency, energy released in the formation of an atom from the subatomic particles.

 

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.

Oxidation-reduction Reactions

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

Band of Stability

Band containing nonradioactive nuclides in a plot of number of neutrons versus atomic number.

Salinometer

An instrument for measuring the amount of salt in a solution. Also,"salimeter, salometer."

Insoluble Compound

A very slightly soluble compound.