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An equation of state that extends the ideal gas law to real gases by inclusion of two empirically determined parameters, which are different for different gases.

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Hydrolysis Constant

An equilibrium constant for a hydrolysis reaction.

Nucleus

The very small, very dense, positively charged center of an atom containing protons and neutrons, as well as other subatomic particles.

Mole Fraction

The number of moles of a component of a mixture divided by the total number of moles in the mixture.

 

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Chemistry & Environmental Dictionary - Contains definitions for many chemistry, environmental and other related technical terms and acronyms.
EDF Chemical Scoreboard - Toxic Release Inventory data for the US. Sources and amounts of toxic chemicals released to air and water. Also has information on health effects and other topics.
Chemistry Articles - Collection of chemistry and chemical related articles.

 

Aromatic Hydrocarbons

Benzene and its derivatives.

Haber Process

A process for the catalyzed industrial production of ammonia from N2 and H2 at high temperature and pressure.

Band of Stability

Band containing nonradioactive nuclides in a plot of number of neutrons versus atomic number.

Associated Ions

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

Derivative

A compound that can be imagined to arise from a partent compound by replacement of one atom with another atom or group of atoms. Used extensively in orgainic chemistry to assist in identifying compounds.

Frequency

The number of repeating corresponding points on a wave that pass a given observation point per unit time.