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Ulsan

(Encyclopedia)Ulsan o͞olˈsänˈ [key], city (1995 pop. 333,178), SE South Korea, an independent metropolitan city and a port on the Korea Strait. Once a fishing port and agricultural center, it is now an industri...

molecule

(Encyclopedia)molecule mŏlˈəkyo͞ol [key] [New Lat.,=little mass], smallest particle of a compound that has all the chemical properties of that compound. A single atom is usually not referred to as a molecule, a...

carbon

(Encyclopedia)CE5 The three solid forms of pure carbon: In the diamond crystal each carbon atom is surrounded symmetrically by four other carbons (at each of the four corners of a tetrahedron). In the graphite c...

Pauling, Linus Carl

(Encyclopedia)Pauling, Linus Carl pôˈlĭng [key], 1901–94, American chemist, b. Portland, Oreg. He was one of the few recipients of two Nobel Prizes, winning the chemistry award in 1954 and the peace prize in 1...

technetium

(Encyclopedia)technetium tĕknēˈshēəm [key] [Gr. technetos=artificial], artificially produced radioactive chemical element; symbol Tc; at. no. 43; mass no. of most stable isotope 98; m.p. 2,200℃; b.p. 4,877�...

Higgins, William

(Encyclopedia)Higgins, William, b. 1762 or 1763, d. 1825, Irish chemist. After study at Oxford he became supervisor of the Royal Dublin Society's mineralogical collection and in 1800 the Society's professor of chem...

Cîmpina

(Encyclopedia)Cîmpina kŭmˈpēnä [key], town, S central Romania, in Walachia. It is a major petroleum ce...

Nederland

(Encyclopedia)Nederland nēˈdərlənd [key], city (1990 pop. 16,192), Jefferson co., SE Tex.; founded by Dutch settlers as a rice-farming community in 1897, inc. 1940. Primarily a residential suburb between Beaumo...

Wollongong

(Encyclopedia)Wollongong wo͝olˈən-gŏng [key], city (2016 pop. 203,630), New South Wales, SE Australia. It is an important iron and steel center. There are other industries, including copper refining and textile...

astatine

(Encyclopedia)astatine ăsˈtətēn, –tĭn [key] [Gr.,=unstable], semimetallic radioactive chemical element; symbol At; at. no. 85; at. wt. of most stable isotope 210; m.p. 302℃ (estimated); b.p. 337℃ (estima...