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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    Density [a] (⁠ kg / L ⁠) Abundance and total mass in Earth's crust [b] (⁠ mg / kg ⁠) Price [7] Year Source Notes USD/kg USD/L [c] 1: H: Hydrogen: 0.00008988: 1400 (3.878 × 10 19 kg) 1.39: 0.000 125: 2012: DOE Hydrogen [8] [d] 1: 2 H (D) Deuterium: 0.0001667 [10] 13 400: 2.23: 2020: CIL [11] [e] 2: He: Helium: 0.0001785: 0.008 (2.216 × ...

  3. Lifting gas - Wikipedia

    en.wikipedia.org/wiki/Lifting_gas

    1 m 3 × 1.202 kg/m 3 × 9.8 N/kg= 11.8 N. Therefore, the amount of mass that can be lifted by helium in air at sea level is: (1.292 - 0.178) kg/m 3 = 1.114 kg/m 3. and the buoyant force for one m 3 of helium in air at sea level is: 1 m 3 × 1.114 kg/m 3 × 9.8 N/kg= 10.9 N. Thus hydrogen's additional buoyancy compared to helium is:

  4. Helium - Wikipedia

    en.wikipedia.org/wiki/Helium

    Some stable helium-3 (two protons and one neutron) is produced in fusion reactions from hydrogen, though its estimated abundance in the universe is about 10 −5 relative to helium-4. [92] Binding energy per nucleon of common isotopes. The binding energy per particle of helium-4 is significantly larger than all nearby nuclides.

  5. Helium storage and conservation - Wikipedia

    en.wikipedia.org/wiki/Helium_storage_and...

    [1] [4] This price jump was an incentive for private companies to enter the market and sell helium at lower prices. [1] [3] [4] By 1970, it also became evident that the projected increase in government demand did not occur and that the helium stored in the Cliffside Field would last for decades. The combination of lower-than-projected demand ...

  6. The Helium Cliff: Will Government Gridlock Send Prices ... - AOL

    www.aol.com/news/2013-08-03-helium-cliff-soaring...

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  8. Musk has until Monday to respond to SEC Twitter settlement ...

    www.aol.com/news/us-sec-extended-timeline-musk...

    The U.S. Securities and Exchange Commission has given Elon Musk until Monday to respond to an offer to resolve a probe into the billionaire's $44-billion takeover of Twitter in 2022, a source ...

  9. Noble gas - Wikipedia

    en.wikipedia.org/wiki/Noble_gas

    Helium is also used as filling gas in nuclear fuel rods for nuclear reactors. [88] Goodyear Blimp. Since the Hindenburg disaster in 1937, [89] helium has replaced hydrogen as a lifting gas in blimps and balloons: despite an 8.6% [90] decrease in buoyancy compared to hydrogen, helium is not combustible. [13]