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Valence bond designation for a complex in which the metal ion utilizes d orbitals in the outermost (occupied) shell in hybridization.

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Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances

xylidine

Any of six isomeric compounds that have the formula C8H11N, are derivatives of xylene, and resemble aniline: used in dye manufacture.

Binding Energy (nuclear binding energy)

The energy equivalent (E = mc^2) of the mass deficiency of an atom.  where: E = is the energy in joules, m is the mass in kilograms, and c is the speed of light in m/s^2

pH

Negative logarithm of the concentration (mol/L) of the H3O+[H+] ion, scale is commonly used over a range 0 to 14.

Cathode Ray Tube

Closed glass tube containing a gas under low pressure, with electrodes near the ends and a luminescent screen at the end near the positive electrode, produces cathode rays when high voltage is applied.

Heavy Water

Water containing deuterium, a heavy isotope of hydrogen.

Cation

A positive ion, an atom or group of atoms that has lost one or more electrons.

Hydrogenation

The reaction in which hydrogen adds across a double or triple bond.

Reaction Quotient

The mass action expression under any set of conditions (not necessarily equlibrium), its magnitude relative to K determines the direction in which the reaction must occur to establish equilibrium.

Electron Deficient Compounds

Compounds that contain at least one atom (other than H) that shares fewer than eight electrons.