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Helium references on wikipedia
Helium
Helium () is the chemical element with atomic number 2, and is represented by the symbol He. It is a colorless, odorless, tasteless, non-toxic, inert monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions.An unknown yellow spectral line signature in sunlight was first observed from a solar eclipse in 1868 by French astronomer Pierre Janssen.
Helium () is the chemical element with atomic number 2, and is represented by the symbol He. It is a colorless, odorless, tasteless, non-toxic, inert monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions.An unknown yellow spectral line signature in sunlight was first observed from a solar eclipse in 1868 by French astronomer Pierre Janssen.
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 Acs.org | American Chemical Society - The world s largest scientific society., Content Portal | ||
| Agu.org | AGU. American Geophysical Union. Earth - Oceans - Atmosphere - Space - Planets | ||
| Aip.org | The American Institute of Physics -- Physics Publications and Resources | ||
| Airproducts.com | Manufacturer of industrial gases and specialty chemicals--Air Products and Chemicals, Inc. | ||
| Aps.org | APS Physics | APS Home | ||
| Archive.org | Internet Archive | ||
| Astronomynotes.com | Astronomy Notes | ||
| Blm.gov | DOI: BLM: National Home Page | ||
| Cam.ac.uk | University of Cambridge | ||
| Cern.ch | CERN - the European Organization for Nuclear Research | ||
| Chartofthenuclides.com | Chart of the Nuclides | ||
| Doi.org | The Digital Object Identifier System | ||
| Du.edu | University of Denver | ||
| Ebyte.it | Ebyte.it | ||
| Edu.pl | Edu.pl | ||
| Einstein-online.info | Einstein Online English | ||
| Fnal.gov | Fermilab | Home | ||
| Gpo.gov | U.S. Government Printing Office Home Page | ||
| Harvard.edu | Harvard home | ||
| Hut.fi | TKK - Teknillinen korkeakoulu - yliopisto-opetusta vuodesta 1908 | ||
| Ingentaconnect.com | IngentaConnect Home | ||
| Jlab.org | Thomas Jefferson Lab National Accelerator Facility | ||
| Jstor.org | Jstor.org | ||
| Lancs.ac.uk | Home page - Lancaster University | ||
| Lanl.gov | Los Alamos National Lab: National Security Science | ||
| Leidenuniv.nl | Universiteit Leiden | ||
| Mantleplumes.org | Do plumes exist? | ||
| Nap.edu | The National Academies Press | ||
| Nasa.gov | NASA - Home | ||
| Nmt.edu | New Mexico Institute of Mining and Technology: Science Engineering Research University | ||
| Oed.com | Oxford English Dictionary: The definitive record of the English language | ||
| Physiology.org | APS Journals | ||
| Rubicon-foundation.org | The Rubicon Foundation: Home | ||
| Sciamdigital.com | Scientific American Digital: Digital archive of all issues from 1993 to present. | ||
| Slate.com | Slate Magazine | ||
| Stanford.edu | Stanford University | ||
| Thespacereview.com | The Space Review: essays and commentary about the final frontier | ||
| Time.com | Breaking News, Analysis, Politics, Blogs, News Photos, Video, Tech Reviews - TIME.com | ||
| Ualberta.ca | University of Alberta - Edmonton, Alberta, Canada | ||
| Unsw.edu.au | UNSW: The University of New South Wales - Sydney Australia - Home page | ||
| Usgs.gov | Welcome to the USGS - U.S. Geological Survey | ||
| Usra.edu | Home | USRA: Universities Space Research Association | ||
| Weather.gov | NOAA s National Weather Service | ||
| Webelements.com | WebElements Periodic Table of the Elements | ||
| Wesleyan.edu | Welcome to Wesleyan University — Middletown, Connecticut | ||
| Wisc.edu | University of Wisconsin-Madison | ||
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