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Compounds that contain only carbon and hydrogen.

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Periodic Law

The properties of the elements are periodic functions of their atomic numbers.

Mass Deficiency

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

Composition Stoichiometry

Descibes the quantitative (mass) relationships among elements in compounds.

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.

Charle's Law

At constant pressure the volume occupied by a definite mass of gas is directly proportional to its absolute temperature.

Lewis Base

Any species that can make available a share in an electron pair.

Dimer

Molecule formed by combination of two smaller (identical) molecules.

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.

Stereoisomers

Isomers that differ only in the way that atoms are oriented in space, consist of geometrical and optical isomers.

 

Intermolecular Forces

Forces between individual particles (atoms, molecules, ions) of a substance.