half-life exchange

  • 111nitrogen group element — ▪ chemical elements Introduction  any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …

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  • 112Erbium — (pronEng|ˈɝbiəm) is a chemical element with the symbol Er and atomic number 68. A rare, silvery, white metallic lanthanide, erbium is a solid in its normal state. It is a rare earth element associated with several other rare elements in the… …

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  • 113Gadolinium — (pronEng|ˌgædəˈlɪniəm) is a chemical element that has the symbol Gd and atomic number 64. TOC Characteristics Gadolinium is a silvery white, malleable and ductile rare earth metal with a metallic lustre. It crystallizes in hexagonal, close packed …

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  • 114Thallium — (pronEng|ˈθæliəm) is a chemical element with the symbol Tl and atomic number 81. [ [http://periodic.lanl.gov/elements/81.html thallium ] , Los Alamos National Laboratory. Retrieved November 21, 2006.] This soft gray malleable poor metal resembles …

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  • 115Levofloxacin — Systematic (IUPAC) name (S) 7 fluoro 6 (4 methylpiperazin 1 yl) 10 oxo 4 thia 1 azatricyclo[7.3.1.05,13] trideca 5(13),6,8,11 tetraene 11 carboxylic acid …

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  • 116Development of Duke Nukem Forever — The video game Duke Nukem Forever spent fifteen years in development, from 1996 to 2011. It is a first person shooter for PC, PlayStation 3 and Xbox 360,[1] developed by 3D Realms, Triptych Games, Gearbox Software and Piranha Games. It is a… …

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  • 117List of Magic: The Gathering characters: E — The fictional multiverse of the Wizards of the Coast Magic: The Gathering trading card game, introduced in 1993, has many characters. This alphabetic list includes characters to which the flavor text on the cards is atributted or who are… …

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  • 118Platinum — This article is about the chemical element. For other uses, see Platinum (disambiguation). iridium ← platinum → gold Pd ↑ Pt ↓ Ds …

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  • 119James Bond 007: Nightfire — James Bond 007: Nightfire …

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  • 120star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …

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