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Refers to species that have only six electrons in the highest energy level of the central element (many Lewis acids).

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Alpha Particles

A helium nucleus.

Mother Nuclide

Nuclide that undergoes nuclear decay.

Isomers

Different substances that have the same formula.

van der Waals' Equation

An equation of state that extends the ideal gas law to real gases by inclusion of two empirically determined parameters, which are different for different gases.

Homogeneous Catalyst

A catalyst that exists in the same phase (solid, liquid or gas) as the reactants. The process is called Homogeneous Catalysis.

Frequency

The number of repeating corresponding points on a wave that pass a given observation point per unit time.

Ampere

Unit of electrical current, one ampere equals one coulomb per second.

 

Periodic Table

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

Linkage Isomers

Isomers in which a particular ligand bonds to a metal ion through different donor atoms.

 

Octane Number

A number that indicates how smoothly a gasoline burns.