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Numbers that describe the energies of electrons in atoms, derived from quantum mechanical treatment.

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xanthate

A salt or ester of xanthic acid. Many xanthates have a yellow color. Xanthates are used as flotation agents in mineral processing.

Nonpolar Bond

Covalent bond in which electron density is symmetrically distributed.

Lewis Base

Any species that can make available a share in an electron pair.

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.

Atomic Orbital

Region or volume in space in which the probability of finding electrons is highest.

Contact Process

Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

Photoelectric Effect

Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy, current increases with increasing intensity of radiation.

 

Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

Associated Ions

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

Aromatic Hydrocarbons

Benzene and its derivatives.