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Assumes that covalent bonds are formed when atomic orbitals on different atoms overlap and the electrons are shared.

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Heavy Water

Water containing deuterium, a heavy isotope of hydrogen.

Exothermic

Describes processes that release heat energy.

Radioactive Tracer

A small amount of radioisotope replacing a nonradioactive isotope of the element in a compound whose path (for example, in the body) or whose decomposition products are to be monitored by detection of radioctivity, also called a radioactive label.

Mechanism

The sequence of steps by which reactants are converted into products.

Critical Pressure

The pressure required to liquefy a gas (vapor) at its critical temperature.

Eluant or eluent

The solvent used in the process of elution, as in liquid chromatography.

 

Water Equivalent

The amount of water that would absorb the same amount of heat as the calorimeter per degree temperature increase.

PseudobinaryIonic Compounds

Compounds that contain more than two elements but are named like binary compounds.

Inert s-pair Effect

Characteristic of the post-transition minerals, tendency of the outermost s electrons to remain nonionized or un shared in compounds.

Nickel-cadmium cell (Nicad battery)

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