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The Chemical Glossary currently has 651 chemical entries. You may search the Chemical Glossary by entering the keyword in the search box or by browsing the entire chemical glossary by letter in alphabetical order.

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Excited State

Any state other than the ground state of an atom or molecule.

Acid

A substance that produces H+(aq) ions in aqueous solution. Strong acids ionize completely or almost completely in dilute aqueous solution. Weak acids ionize only slightly. Chemicals or substances having the property of an acid are said to be acidic.

Conjugated Double Bonds

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

Hydrolysis Constant

An equilibrium constant for a hydrolysis reaction.

Emulsion

Colloidal suspension of a liquid in a liquid.

Theoretical Yield

Maximum amount of a specified product that could be obtained from specified amounts of reactants, assuming complete consumption of limiting reactant according to only one reaction and complete recovery of product.

Periodic Table

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

Polyene

A compound that contains more than one double bond per molecule.

Magnetic Quantum Number (mc)

Quantum mechanical solution to a wave equation that designates the particular orbital within a given set (s, p, d, f ) in which a electron resides.

Coulomb

Unit of electrical charge.