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copernicium

(Encyclopedia)copernicium, artificially produced radioactive chemical element; symbol Cn; at. no. 112; mass number of most stable isotope 285; m.p., b.p., sp. gr., and valence unknown. Situated in Group 12 of the p...

Consumers' Union

(Encyclopedia)Consumers' Union, product testing and rating organization founded (1936) to provide consumers with information and counsel regarding major retail goods and services. Through its monthly Consumer Repor...

Teamsters Union

(Encyclopedia)Teamsters Union, U.S. labor union formed in 1903 by the amalgamation of the Team Drivers International Union and the Teamsters National Union. Its full name is the International Brotherhood of Teamste...

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,...

chloride

(Encyclopedia)chloride klōrˈīd, klôrˈ– [key], chemical compound containing chlorine. Most chlorides are salts that are formed either by direct union of chlorine with a metal or by reaction of hydrochloric ac...

Pan-American Union

(Encyclopedia)Pan-American Union, former name for the General Secretariat of the Organization of American States (OAS). It was founded (1889–90) at the first of the modern Inter-American Conferences (see Pan-Amer...

niobium

(Encyclopedia)niobium nīōˈbēəm [key], metallic chemical element; symbol Nb; at. no. 41; at. wt. 92.90638; m.p. about 2,468℃; b.p. 4,742℃; sp. gr. 8.57 at 20℃; valence +2, +3, +4, or +5. Niobium is a rare...

mole, in chemistry

(Encyclopedia)mole, in chemistry, a quantity of particles of any type equal to Avogadro's number, or 6.02×1023 particles. One gram-molecular weight of any molecular substance contains exactly one mole of molecules...

African Union

(Encyclopedia)African Union (AU), international organization established in 2002 by the nations of the former Organization of African Unity (OAU). The AU is the successor organization to the OAU, with greater power...

Union

(Encyclopedia)Union, industrial township (1990 pop. 50,024), Union co., NE N.J.; settled 1749 by colonists from Connecticut, set off from Elizabethtown 1808. Steel and metal products and paint are among its various...