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A colorless, crystalline pentose sugar, C5H10O5, derived from xylan, straw, corncobs, etc., by treating with heated dilute sulfuric acid, and dehydrating to furfural if stronger acid is used.

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Substance

Any kind of matter all specimens of which have the same chemical composition and physical properties.

 

Coordination Compound or Complex

A compound containing coordinate covalent bonds.

Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Metal

An element below and to the left of the stepwise division (metalloids) in the upper right corner of the periodic table, about 80% of the known elements are metals.

Transition State Theory

Theory of reaction rates that states that reactants pass through high-energy transition states before forming products.

Domain

A cluster of atoms in a ferromagnetic substance, all of which align in the same direction in the presence of an external magnetic field.

Diagonal Similarities

Refers to chemical similarities in the Periodic Table of elements of Period 2 to elements of Period 3 one group to the right, especially evident toward the left of the periodic table.

xenon trioxide

A colorless, nonvolatile solid, XeO3, explosive when dry: in solution it is called xenic acid.

Isomers

Different substances that have the same formula.

Stoichiometry

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