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An algebraic increase in the oxidation number, may correspond to a loss of electrons.

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Reactants

Substances consumed in a chemical reaction.

Radical

An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)

Polymorphous

Refers to substances that crystallize in more than one crystalline arrangement.

Halogens

Group VIIA elements: F, Cl, Br, I

Heisenberg Uncertainty Principle

It is impossible to determine accurately both the momentum and position of an electron simultaneously.

Percent Composition

The mass percent of each element in a compound.

Structural Isomers

Compounds that contain the same number of the same kinds of atoms in different geometric arrangements.

Primary Standard

A substance of a known high degree of purity that undergoes one invariable reaction with the other reactant of interest.

Solvent

The dispersing medium of a solution.

Dubnium

Discovered : at both Berkeley, California, USA, and Dubna, near Moscow, Russia in 1970. Description:A highly radioactive metal which does not occur naturally, and of which only a few atoms have ever been made. It is of research interest only. Origin:The element is named after the Russian town of Dubna.