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Voltaic cells in which the reactants (usually gases) are supplied continuously.
A voltaic cell that converts the chemical energy of a fuel and an oxidizing agent directly into electriacl energy on a continuous basis.

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Chemical Bonds

The attractive forces that hold atoms together in elements or compounds.

Molecular Formula

Formula that indicates the actual number of atoms present in a molecule of a molecular substance.

Hydrate

A solid compound that contains a definite percentage of bound water.

Single Bond

Covalent bond resulting from the sharing of two electrons (one pair) between two atoms.

Explosive

A chemical or compound that causes a sudden, almost instantaneous release or pressure, gas, heat and light when subjected to sudden shock, pressure, high temperature or applied potential.

Group

A vertical column in the periodic table, also called a family.

D -Transition elements (metals)

B Group elements except IIB in the periodic table, sometimes called simply transition elements EX. Fe, Ni, Cu, Ti .
For further information see Metals.

Dextrorotatory

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

Semiconductor

A substance that does not conduct electricity at low temperatures but does so at higher temperatures.

Carcinogen

A substance capable of causing or producing cancer in mammals.