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The indicator of spontaneity of a process at constnt T and P. If delta-G is negative, the process is spontaneous.

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Potential Energy

Energy that matter possesses by virtue of its position, condition or composition.

Nonpolar Bond

Covalent bond in which electron density is symmetrically distributed.

Half-Life

The time required for half of a reactant to be converted into product(s). The time required for half of a given sample to undergo radioactive decay.

Activity Series

A listing of metals (and hydrogen) in order of decreasing activity.

Mixture

A sample of matter composed of two or more substances, each of which retains its identity and properties.

Saccharate

A compound formed by interaction of sucrose with a metallic oxide, usually lime, and useful in the purification of sugar.

 

Adsorption

Adhesion of a species onto the surfaces of particles.

Curie (Ci)

The basic unit used to describe the intensity of radioactivity in a sample of material. One curie equals 37 billion disintegrations per second or approximately the amount of radioactivty given off by 1 gram of radium.

Metal

An element below and to the left of the stepwise division (metalloids) in the upper right corner of the periodic table, about 80% of the known elements are metals.

Atom

The smallest particle of an element.