ununpentium
ununpentium artificially produced radioactive chemical element; symbol Uup; at. no. 115; mass number of most stable isotope 288; m.p., b.p., sp. gr., and valence unknown. Situated in Group 15 of the periodic table , it is expected to have properties similar to those of bismuth and antimony .
In a 27-day experiment in 2003, scientists from the Joint Institute for Nuclear Research in Dubna, Russia, and Lawrence Livermore National Laboratory in California collaborated in the discovery of ununpentium. They bombarded atoms of americium -243 with ions of calcium -48. Among the products of the bombardment were one atom of ununpentium-287 and three atoms of ununpentium-288, each of which in less than one tenth of a second decayed into atoms of ununtrium by emitting an alpha particle. No name has yet been adopted for element 115, which is therefore called ununpentium, from the Latin roots un for one and pent for five, under a convention for neutral temporary names proposed by the International Union of Pure and Applied Chemistry (IUPAC) in 1980.
See also synthetic elements ; transactinide elements ; transuranium elements .
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Tikal Resources Corp. and BelAir Energy Corporation Enter Into Definitive Agreement.
News Wire article from: Canadian Corporate News; 10/22/2001; 700+ words
; ...CALGARY, ALBERTA, OCTOBER 22, 2001 TIKAL RESOURCES CORP. (TSE:TKZ) AND...issued and outstanding common shares of Tikal for consideration of 0.4 of a BelAir common share for each common share of Tikal. This represents a premium of 30...
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TIKAL RESOURCES CORP.
Magazine article from: Alberta Report; 2/19/2001; ; 700+ words
; Tikal Resources, a Calgary-based oil and gas...committed to thinking "outside the box." Tikal is a comparatively small firm that prefers...started another company in 1998, he called it Tikal Resources Ltd., recalling a visit to the...
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Tikal Resources Announces Nine Months Financial Results.
Business Wire; 11/29/2001; 700+ words
; ...Alberta--(BUSINESS WIRE)--Nov. 29, 2001 Tikal Resources Corp. (TSE:TKZ.)("Tikal") today announced the financial and operating...422 CORPORATE ACTIVITY On October 22, 2001 Tikal Resources Corp. ("Tikal") jointly announced...
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Tikal's urban jungle In Guatemala, the Ruins of an ancient Mayan city are splendor in the grass
Newspaper article from: The Boston Globe; 1/30/1994; ; 700+ words
; TIKAL, Guatemala -- After taking us through the...ruined shrines -- Tony Ortiz, a veteran Tikal National Park guide with a strong sense of...overlooking the Great Plaza. "This is the Tikal that everybody knows," Ortiz said, with...
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BelAir Energy Corporation and Tikal Resources Corp. Proceed with Business Combination.
News Wire article from: Canadian Corporate News; 11/9/2001; 700+ words
; CALGARY, ALBERTA, NOVEMBER 9, 2001 TIKAL RESOURCES CORP. (TKZ:TSE) and BELAIR...issued and outstanding common shares of Tikal. The parties have signed a binding Arrangement Agreement pursuant to which BelAir and Tikal shall amalgamate by way of a plan of arrangement...
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BelAir Energy Corporation Makes an Offer for Tikal Resources Corp.
News Wire article from: Canadian Corporate News; 10/22/2001; 700+ words
; ...BelAir Energy Corporation (BEC:TSE) and Tikal Resources Corp. (TKZ:TSE) jointly...issued and outstanding common shares of Tikal for consideration of 0.4 of a BelAir common share for each common share of Tikal. This represents a premium of 30% to...
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Tikal Updates Clarke Lake Drilling and Testing Activity.
News Wire article from: Canadian Corporate News; 3/13/2001; 700+ words
; ...ALBERTA--(CCN Newswire, March 13, 2001) Tikal Resources Corp. ("Tikal") today updated the results of their winter drilling...theelopment region are being adversely impacted. Tikal will be moving its drilling rig, completion rig...
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Tikal Resources Announces 2000 Financial Results; Cash Flow up 110%.
News Wire article from: Canadian Corporate News; 4/10/2001; 700+ words
; CALGARY, ALBERTA, APR 10, 2001 Tikal Resources Corp. ("Tikal") today announced record financial and operating results...direction of the Company, Mr. Daryl Connolly, President of Tikal stated, "Tikal in Canada continued to focus on exploration...
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 "Deseret News (Salt Lake City)")
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Tikal, Guatemala -- Exploring ancient history
Newspaper article from: Deseret News (Salt Lake City); 11/19/2006; ; 700+ words
; TIKAL, Guatemala -- The jungle rises 100 feet...used it in a "Star Wars" movie. This is Tikal, in the tropics of Guatemala. It is one...You can spend several days walking through Tikal -- walking where the Maya walked, trying...
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Tikal Announces Flow Through Issue Increased to $5.5 Million and Recent Drilling Results.
News Wire article from: Canadian Corporate News; 5/7/2001; 692 words
; ...ALBERTA--(CCN Disclosure, December 12, 2000) Tikal Resources Corp. ("Tikal") announced today that it will be issuing, pursuant...share for aggregate procd Inc. acted as agent to Tikal in respect of the offering. When combined with Tikal...
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Tikal
Book article from: The Columbia Encyclopedia, Sixth Edition
Tikal , ruined city of the Classic Period of the Maya , N central Petén, Guatemala. The largest and possibly the oldest of the Maya cities, Tikal consists of nine groups of courts and plazas built on hilly land above surrounding...
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Maya
Encyclopedia entry from: Gale Encyclopedia of U.S. Economic History
...Copan), Mexico (Palenque, Uxmal, and Chichen Itza), and Guatemala (Piedras Negras, Uaxxactan, and Tikal). The capital was at Tikal (population 50,000), which was a center of education, economics, science, and religion. Mayan accomplishments...
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pre-Columbian art and architecture
Book article from: The Columbia Encyclopedia, Sixth Edition
...regions: the Petén district (Uaxactún and Tikal ); the cities of the river valleys, such as Piedras Negras...uacute; and in varying degrees at other sites, including Tikal and Uaxactún. Erected on high land above the surrounding...
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Mayan Temples
Encyclopedia entry from: Gale Encyclopedia of the Unusual and Unexplained
...ball games, and blocks of stone inscribed with hieroglyphics. Tikal, another Mayan center in Guatemala, had more than 3,000...and increasingly larger buildings approaching the center of Tikal accommodated a surrounding community that may have numbered...
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American Philosophical Society
Dictionary entry from: Dictionary of American History
...program of research grants, including the gift of large amounts for some projects, such as for extensive archaeological work at Tikal, Guatemala, and a number of smaller grants to individuals (these totaled roughly $400,000 annually by the end of the twentieth...
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