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Refers to different atomic forms of all elements in contrast to ?isotopes?, which refer only to different atomic forms of a single element.

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Mother Nuclide

Nuclide that undergoes nuclear decay.

Fossil Fuels

Substances consisting largely of hydrocarbons, derived from decay of organic materials under geological conditions of high pressure and temperature (metamorphism) include coal, petroleum, natural gas, peat and oil shale.  For further information see Fuel Chemistry

Detergent

A soap-like emulsifer that contains a sulfate, SO3 or a phosphate group instead of a carboxylate group.

Molar Solubility

Number of moles of a solute that dissolve to produce a litre of saturated solution.

Geiger counter

A gas filled tube which discharges electriaclly when ionizing radiation passes through it.

Anion

A negative ion, an atom or goup of atoms that has gained one or more electrons.

 

Saturated Solution

Solution in which no more solute will dissolve.

Chemical Equilibrium

A state of dynamic balance in which the rates of forward and reverse reactions are equal, there is no net change in concentrations of reactants or products while a system is at equilibrium.

Overlap

The interaction of orbitals on different atoms in the same region of space.

Particulate Matter

Fine divided solid particles suspended in polluted air.