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A theory, that attempts to explain macroscopic observations on gases in microscopic observations on gases in microscopic observations on gases in microscopic or molecular terms.

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Nucleus

The very small, very dense, positively charged center of an atom containing protons and neutrons, as well as other subatomic particles.

Solubility Product Principle

The solubility product constant expression for a slightly soluble compound is the product of the concentrations of the constituent ions, each raised to the power that corresponds to the number of ions in one formula unit.

Stoichiometry

Description of the quantitative relationships among elements and compounds as they undergo chemical changes.

Displacement Reactions

Reactions in which one element displaces another from a compound.

 

Basic Salt

A salt containing an ionizable OH group.

Formula Weight

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

 

Coordination Number

In describing crystals, the number of nearest neighbours of an atom or ion. The number of donor atoms coordinated to a metal.

Deposition

The direct solidification of a vapor by cooling, the reverse of sublimation.

Ore

A natural deposit containing a mineral of an element to be extracted.

xylan

The pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural.