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xenonThe Columbia Encyclopedia. Copyright © 2001-09 Columbia University Press. All rights reserved.
- Periodic Table of the Elements: Xenon
Periodic Table of the Elements: XenonAtomic Number:54Atomic Symbol:XeXenonAtomic Weight:131.29ElectronConfiguration:2 · 8 · 1818 · 8
- Xe
Xe, symbol for the element xenon.
- inert gas
Inert gas or noble gas, any of the elements in Group 18 of the periodic table. In order of increasing atomic number they are: helium, neon, argon, krypton, xenon, and radon. They are colorless...
- Ramsay, Sir William
Ramsay, Sir William, 1852–1916, Scottish chemist. He was professor of chemistry at University College, Bristol (1880–87), and at University College, London (1887–1912). In his early experiment...
- argon
Argon [Gr.,=inert], gaseous chemical element; symbol Ar; at. no. 18; at. wt. 39.948; m.p. -189.2°C; b.p. -185.7°C; density 1.784 grams per liter at STP; valence 0. Argon is a colorless, odorle...
- nonmetal
Nonmetal, chemical element possessing certain properties by which it is distinguished from a metal. In general, this distinction is drawn on the basis that a nonmetal tends to accept electrons...
- fluorine
Fluorine, gaseous chemical element; symbol F; at. no. 9; at. wt. 18.998403; m.p. -219.6°C; b.p. -188.14°C; density 1.696 grams per liter at STP; valence -1. Fluorine is a yellowish, poisonous,...
- atmosphere
Atmosphere [Gr.,=sphere of air], the mixture of gases surrounding a celestial body with sufficient gravity to maintain it. Although some details about the atmospheres of other planets and sate...
- lighting
Lighting, light produced by artificial means to allow visibility in enclosures and at night. For stage lighting, see scene design and stage lighting. The earliest means of artificial lighting ...
- Elements (table)
ElementsElementSymbolAtomic NumberAtomic Weight1Melting Point(Degrees Celsius)Boiling Point(Degrees Celsius)1 Parentheses indicate most stable isotope.actiniumAc89227.02781050.3200....
