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A dry cell in which the anode is Cd, the cathode is NiO2, and the electrolyte is basic.

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Delocalization

Of electrons, refers to bonding electrons that are distributed among more than two atoms that are bonded together, occurs in species that exhibit resonance.
The formation of a set of molecular orbitals that extend over more than two atoms, important in species that valence bond theory describes in terms of resonance.

Hybridization

Mixing a set of atomic orbitals to form a new set of atomic orbitals with the same total electron capacity and with properties and energies intermediate between those of the original unhybridized orbitals.

Hydrate Isomers

Isomers of crystalline complexes that differ in whether water is present inside or outside the coordination sphere.

Lewis Acid

Any species that can accept a share in an electron pair.

Condensation

Liquefaction of vapor.

Saccharic

of or derived from saccharin or a saccharine substance.

 

Associated Ions

Short-lived species formed by the collision of dissolved ions of opposite charges.

Coulomb

Unit of electrical charge.

Differential Thermometer

A thermometer used for accurate measurement of very small changes in temperature.

Cis-

The prefix used to indicate that groups are located on the same side of a bon about which rotation is restricted.

Heavy Water

Water containing deuterium, a heavy isotope of hydrogen.

Hess' Law of Heat Summation

The enthalpy change for a reaction is the same whether it occurs in one step or a series of steps.

First Law of Thermodynamics

The total amount of energy in the universe is constant (also known as the Law of Conservation of Energy) energy is neither created nor destroyed in ordinary chemical reactions and physical changes.

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Photochemical Smog

A brownish smog occurring in urban areas receiving large amounts of sunlight, caused by photochemical (light-induced) reactions among nitrogen oxides, hydrocarbons and other components of polluted air that produce photochemical oxidants.

 

Particulate Matter

Fine divided solid particles suspended in polluted air.

xylene

Any of three oily, colorless, water-insoluble, flammable, toxic, isomeric liquids, C8H10, of the benzene series, obtained mostly from coal tar: used chiefly in the manufacture of dyes.

Addition Reaction

A reaction in which two atoms or groups of atoms are added to a molecule, one on each side of a double or triple bond. Types of addition reaction include electrophilic, nucleophilic (polar) and free radical addition (non-polar).

Electronic Transition

The transfer of an electron from one energy level to another.

Equilibrium Constant

A quantity that characterizes the position of equilibrium for a reversible reaction, its magnitude is equal to the mass action expression at equilibrium. K varies with temperature.