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Double bonds that are separated from each other by one single bond -C=C-C=C-.

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Rate of Reaction

Change in the concentration of a reactant or product per unit time.

Activity Series

A listing of metals (and hydrogen) in order of decreasing activity.

Gamma Ray

High energy electromagnetic radiation. A highly penetrating type of nuclear radiation similar to x-ray radiation, except that it comes from within the nucleus of an atom and has a higher energy. Energywise, very similar to cosmic ray except that cosmic rays originate from outer space.

Eluant or eluent

The solvent used in the process of elution, as in liquid chromatography.

 

Endothermic

Describes processes that absorb heat energy.

Quantum Mechanics

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

Conjugated Double Bonds

Double bonds that are separated from each other by one single bond -C=C-C=C-.

Safranine

Also called "phenosafranine". A purplish-red, water-soluble dye, C18H14N4, used for textiles and as a stain in microscopy.

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.

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.