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  2. Helium - Wikipedia

    en.wikipedia.org/wiki/Helium

    Helium is a commonly used carrier gas for gas chromatography. The age of rocks and minerals that contain uranium and thorium can be estimated by measuring the level of helium with a process known as helium dating. [28] [30] Helium at low temperatures is used in cryogenics and in certain cryogenic applications.

  3. Helium atom - Wikipedia

    en.wikipedia.org/wiki/Helium_atom

    Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with two neutrons, depending on the isotope, held together by the strong force. Unlike for hydrogen , a closed-form solution to the Schrödinger equation for the helium atom has not been found.

  4. Helium compounds - Wikipedia

    en.wikipedia.org/wiki/Helium_compounds

    Helium's first ionization energy of 24.57 eV is the highest of any element. [2] Helium has a complete shell of electrons, and in this form the atom does not readily accept any extra electrons nor join with anything to make covalent compounds. The electron affinity is 0.080 eV, which is very close to zero. [2]

  5. Explainer-What is helium and why is it used in rockets? - AOL

    www.aol.com/news/explainer-helium-why-used...

    Helium is inert - it does not react with other substances or combust - and its atomic number is 2, making it the second lightest element after hydrogen. Rockets need to achieve specific speeds and ...

  6. Noble gas - Wikipedia

    en.wikipedia.org/wiki/Noble_gas

    The inertness of noble gases makes them useful whenever chemical reactions are unwanted. For example, argon is used as a shielding gas in welding and as a filler gas in incandescent light bulbs. Helium is used to provide buoyancy in blimps and balloons. Helium and neon are also used as refrigerants due to their low boiling points.

  7. Helium-4 - Wikipedia

    en.wikipedia.org/wiki/Helium-4

    Helium-4 makes up about one quarter of the ordinary matter in the universe by mass, with almost all of the rest being hydrogen. While nuclear fusion in stars also produces helium-4, most of the helium-4 in the Sun and in the universe is thought to have been produced during the Big Bang, known as "primordial helium". However, primordial helium-4 ...

  8. The fate of America's largest supply of helium is up in the air

    www.aol.com/fate-america-largest-supply-helium...

    The U.S. is currently experiencing the fourth in a series of helium shortages since 2006, according to helium consultant Phil Kornbluth. “The world has experienced eight years of helium shortage ...

  9. Isotopes of helium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_helium

    The most widely studied heavy helium isotope is 8 He. 8 He and 6 He are thought to consist of a normal 4 He nucleus surrounded by a neutron "halo" (of two neutrons in 6 He and four neutrons in 8 He). Halo nuclei have become an area of intense research. Isotopes up to 10 He, with two protons and eight neutrons, have been confirmed.