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organic chemistry

(Encyclopedia)organic chemistry, branch of chemistry dealing with the compounds of carbon. While it is only the fourteenth most common element on earth, carbon forms by far the greatest number of different compound...

organometallic chemistry

(Encyclopedia)organometallic chemistry, the reactions and use of a class of compounds (R-M) that contain a covalent bond between carbon and metal. They are prepared either by direct reaction of the metal with an or...

Costa del Sol

(Encyclopedia)Costa del Sol kōˈstä ᵺĕl sōlˈ [key], a strip of coastline, S. Spain, in Andalusia, extending from Motril to Estepona The area has become famous as a Mediterranean coastal resort, and its touri...

Calderón Sol, Armando

(Encyclopedia)Calderón Sol, Armando, 1948–2017, Salvadoran political leader, , b. San Salvador, J.D. Univ. of El Salvador, 1977. A member of the right-wing National Republican Alliance, he held several positions...

tonic sol-fa

(Encyclopedia)tonic sol-fa: see musical notation. ...

Sol, in Roman religion

(Encyclopedia)Sol sŏl [key], in Roman religion, sun god. An ancient god of Mesopotamian origin, he was introduced (c.220) into Roman religion as Sol Invictus by emperor Heliogabalus. His worship remained an import...

earth, in chemistry

(Encyclopedia)earth, in chemistry, metallic oxide not readily reducible by chemical means, e.g., alkaline earths, rare earths, and alumina. The name is also applied to certain absorbent clays, e.g., fuller's earth,...

dispersion, in chemistry

(Encyclopedia)dispersion, in chemistry, mixture in which fine particles of one substance are scattered throughout another substance. A dispersion is classed as a suspension, colloid, or solution. Generally, the par...

ether, in chemistry

(Encyclopedia)CE5 Ethers ether, any of a number of organic compounds whose molecules contain two hydrocarbon groups joined by single bonds to an oxygen atom. The most common of these compounds is ethyl ether, C...

ion, in chemistry

(Encyclopedia)ion, atom or group of atoms having a net electric charge. Ionization has many applications. Vapor lamps and fluorescent lamps take advantage of the light given off when positive ions recombine with ...