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An equation giving the concentration of a reactant remaining after a specified time, has different mathematical form for different orders of reactants.

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Structural Isomers

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

Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

Complex Ions

Ions resulting from the formation of coordinate covalent bonds between simple ions and other ions or molecules.

Calorie

The amount of heat required to raise the temperature of one gram of water from 14.5°C to 15.5°C. 1 calorie = 4.184 joules.

Forbidden Zone

A relatively large energy separation between an insulator's highest filled electron energy band and the next higher energy vacant band. Beginning in the fourth energy level, a set of seven degenerate orbitals per energy level, higher in energy than s, p, and d orbitals of the same energy level.

Heavy Water

Water containing deuterium, a heavy isotope of hydrogen.

Capillary

A tube having a very small inside diameter.

Low Spin Complex

Crystal field designation for an inner orbital complex, contains electrons paired t2g orbitals before eg orbitals are occupied in octahedral complexes.

Electron Configuration

Specific distribution of electrons in atomic orbitals of atoms or ions.

Gel

Colloidal suspension of a solid dispersed in a liquid, a semirigid solid.