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A compound consisting of two elements, may be ionic or covalent.

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Acyl Group

Compound derived from a carbonic acid by replacing the --OH group with a halogen (X), usually --Cl, general formula is O R--C--X.

London Forces

Very weak and very short-range attractive forces between short-lived temporary (induced) dipoles, also called dispersion Forces.

Dextrorotatory

Refers to an optically active substance that rotates the plane of plane polarized light clockwise, also called dextro.

Oxidizing Agent

The substance that oxidizes another substance and is reduced.

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.

Active Metal

Metal with low ionization energy that loses electrons readily to form cations.

Formula Weight

The mass of one formula unit of a substance in atomic mass units.

 

Electrochemistry

Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.

Cis-

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

Mass Action Expression

For a reversible reaction, aA + bB cC + dD the product of the concentrations of the products (species on the right), each raised to the power that corresponds to its coefficient in the balanced chemical equation, divided by the product of the concentrations of reactants (species on the left), each raised to the power that corresponds to its coefficient in the balanced chemical equation. At equilibrium the mass action expression is equal to K, at other times it is Q.[C]c[D]d [A]a[B]b = Q, or at equilibrium K.