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Valence bond designation for a complex in which the metal ion utilizes d orbitals for one shell inside the outermost occupied shell in its hybridization.

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History of fireworks

There is an assumption that the history of fireworks started in China, about 2000 years ago. It is possible that the Chinese accidentally discovered explosions by burning bamboo canes.

DP number

The degree of polymerization, the average number of monomer units per polymer unit.

Voltage

Potential difference between two electrodes, a measure of the chemical potential for a redox reaction to occur.

Dissociation Constant

Equilibrium constant that applies to the dissociation of a comples ion into a simple ion and coordinating species (ligands).

Pairing Energy

Energy required to pair two electrons in the same orbital.

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Primary Voltaic Cells

Voltaic cells that cannot be recharged, no further chemical reaction is possible once the reactants are consumed.

Heisenberg Uncertainty Principle

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

xylan

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

Actinides

Elements 89 to 103 (between lawrencium and actinium) on the periodic table. Only the first four have been found in nature in appreciable amounts. The remainder have been produced synthetically.