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Villahermosa
(Encyclopedia)Villahermosa vēˌyäārmōˈsä [key], city (1990 pop. 261,321), capital of Tabasco state, SE Mexico, on the Grijalva River. The city, which has good communications facilities, is the commercial and ...mendelevium
(Encyclopedia)mendelevium mĕndəlāvˈēəm [key], artificially produced radioactive chemical element; symbol Md; at. no. 101; mass no. of most stable isotope 258; m.p. 827℃; b.p. and sp. gr. unknown; valence +1...atomic weight
(Encyclopedia)atomic weight, mean (weighted average) of the masses of all the naturally occurring isotopes of a chemical element, as contrasted with atomic mass, which is the mass of any individual isotope. Althoug...József, Attila
(Encyclopedia)József, Attila äˈtĭlä yōˈzhĕf [key], 1905–37, Hungarian poet. Born in Budapest of a poor family, József had to support himself from the age of seven with menial jobs; he was never able to e...Rydberg, Johannes Robert
(Encyclopedia)Rydberg, Johannes Robert yo͞oˈhänəs rôˈbərt rüdˈbĕryə [key], 1854–1919, Swedish physicist. Rydberg was a professor at Lund from 1901 to 1919. He is best known for his grouping of the freq...Hevesy, Georg von
(Encyclopedia)Hevesy, Georg von gāˈôrkh fən hĕˈvĕshē [key], 1885–1966, Hungarian physicist and chemist. He received the 1943 Nobel Prize in Chemistry for his work on the use of isotopes as tracers in stud...Periodic Table of the Elements: Niobium
(Encyclopedia)Periodic Table of the Elements: Niobium ...Periodic Table of the Elements: Nitrogen
(Encyclopedia)Periodic Table of the Elements: Nitrogen ...Periodic Table of the Elements: Nobelium
(Encyclopedia)Periodic Table of the Elements: Nobelium ...Periodic Table of the Elements: Oganesson
(Encyclopedia)Periodic Table of the Elements: Oganesson ...Browse by Subject
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