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By convention, potential, Eo, of a half-reaction as a reduction relative to the standard hydrogen electrode when all species are present at unit activity.

 

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Alpha Particles

A helium nucleus.

Radioactivity

The spontaneous disintegration of atomic nuclei.

Bond Energy

The amount of energy necessary to break one mole of bonds of a given kind (in gas phase).The amount of energy necessary to break one mole of bonds in a substance, dissociating the sustance in the gaseous state into atoms of its elements in the gaseous state.

Square Planar Complex

Complex in which the metal is in the center of a square plane, with ligand donor atoms at each of the four corners.

Boron Hydrides

Binary compounds of boron and hydrogen.

Differential Thermometer

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

Dispersing Medium

The solvent-like phase in a colloid.

Buret

A piece of volumetric glassware, usually graduated in 0.1-mL intervals, that is used to deliver solutions to be used in titrations in a quantitative (dropwise) manner.

Antibonding Orbital

A molecular orbital higher in energy than any of the atomic orbitals from which it is derived, lends instability to a molecule or ion when populated with electrons, denoted with a star (*) superscript or symbol.

Oil

Liquid triester of glycerol and unsaturated fatty acids.