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Xe
(Encyclopedia)Xe, symbol for the element xenon.Varda, Agnès
(Encyclopedia)Varda, Agnès änyĕsˈ värdäˈ [key] 1928–2019, French filmmaker, b. Brussels. Varda began her career as a theatrical photographer (1951–61) and photojournalist. Her first film, La Pointe Court...Periodic Table of the Elements: Xenon
(Encyclopedia)Periodic Table of the Elements: Xenon ...xenon
(Encyclopedia)xenon zēˈnŏn [key] [Gr.,=strange], gaseous chemical element; symbol Xe; at. no. 54; at. wt. 131.293; m.p. −111.9℃; b.p. −107.1℃; density 5.86 grams per liter at STP; valence usually 0. Xeno...gamma-ray astronomy
(Encyclopedia)gamma-ray astronomy, study of astronomical objects by analysis of the most energetic electromagnetic radiation they emit. Gamma rays are shorter in wavelength and hence more energetic than X rays (see...Periodic Table of the Elements (table)
(Encyclopedia)Periodic Table of the Elements (showing atomic number and atomic symbol; click on atomic symbol for more detailed information) Lanthanide Series(Rare Earth Elements) Actinide Series(Radioactive Rar...Elements (table)
(Encyclopedia)Elements 1 Parentheses indicate most stable isotope; brackets enclose lower and upper bounds of weight variation. ...Browse by Subject
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