Main Page

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Today's featured picture

Noble gas

The noble gases are a group of chemical elements with similar properties in the periodic table. The six noble gases that occur naturally are helium, neon, argon, krypton, xenon, and the radioactive radon. Under standard conditions, the gases are all colorless, odorless, tasteless, and nonflammable. The noble gases show extremely low chemical reactivity, and only a few hundred noble gas compounds have been formed.

This picture shows a gas discharge tube containing krypton.

See images of other noble gases: Helium · Neon · Argon

Photograph: Alchemist-hp

Other areas of Wikipedia

  • Community portal – Bulletin board, projects, resources and activities covering a wide range of Wikipedia areas.
  • Help desk – Ask questions about using Wikipedia.
  • Local embassy – For Wikipedia-related communication in languages other than English.
  • Reference desk – Serving as virtual librarians, Wikipedia volunteers tackle your questions on a wide range of subjects.
  • Site news – Announcements, updates, articles and press releases on Wikipedia and the Wikimedia Foundation.
  • Village pump – For discussions about Wikipedia itself, including areas for technical issues and policies.

Wikipedia's sister projects

Wikipedia is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other projects:

Wikipedia languages