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Decomposition by heating a substance in the presence of a catalyst and in the absence of air.

 

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Cis-

The prefix used to indicate that groups are located on the same side of a bon about which rotation is restricted.

Quantum Mechanics

Mathematical method of treating particles on the basis of quantum theory, which assumes that energy (of small particles) is not infinitely divisible.

Nodal Plane

A region in which the probability of finding an electron is zero.

 

Saccharide

An organic compound containing a sugar or sugars.

Essential Oil

A plant extract that has a distinctive odour or flavour.

Dissociation Constant

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

Beta Particle

Electron emitted from the nucleus when a neuton decays to a proton and an electron.

Henry's Law

The pressure of the gas above a solution is proportional to the concentration of the gas in the solution.

Downs Cell

Electrolytic cell for the commercial electrolysis of molten sodium chloride. For further information see Electrochemistry or Fuel Cells.

Shielding Effect

Electrons in filled sets of s , p orbitals between the nucleus and outer shell electrons shield the outer shell electrons somewhat from the effect of protons in the nucleus, also called screening effect.