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A Nuclear particle with the mass of an electron but opposite charge.

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Active Metal

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

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Heteronuclear

Consisting of different elements.

Born-Haber Cycle

A series of reactions (and accompanying enthalpy changes) which, when summed, represents the hypothetical one-step reaction by which elements in their standard states are converted into crystals of ionic compounds (and the accompanying enthalpy changes.)

Primary Standard

A substance of a known high degree of purity that undergoes one invariable reaction with the other reactant of interest.

Conjugated Double Bonds

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

Photoelectric Effect

Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy, current increases with increasing intensity of radiation.

 

Electrolytic Cells

Electrochemical cells in which electrical energy causes nospontaneous redox reactions to occur. An electrochemical cell in which chemical reactions are forced to occur by the application of an outside source of electrical energy.

Electronic Geometry

The geometric arrangement of orbitals containing the shared and unshared electron pairs surrounding the central atom of a molecule or polyatomic ion.

Enantiomer

One of the two mirror-image forms of an optically active molecule.