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1. Helium: The in-house PDF rendering service has been withdrawn. An independent open source renderer MediaWiki2LaTeX is available. For Help with downloading a Wikipedia page as a PDF, see Help:Download as PDF. (Physics) [100%] 2023-11-30 [Helium]
2. Helium: Helium (also known as "He" in stoichiometry circles) is the lightest of the noble gases. It holds court in stars (named after the Greek god of the sun, Helios) and kid's balloons. [100%] 2023-12-22
3. Helium: Helium is a chemical element, typically found as a gas in its elemental form. It has the chemical symbol He, atomic number (number of protons) Z = 2, and a standard atomic weight of 4.002602 g/mol. [100%] 2022-10-08
4. Helium: Helium is the second element on the periodic table of the elements. It is also the second most abundant element in the universe, after hydrogen. [100%] 2023-03-03 [Elements]
5. Helium: Helium (from Greek: ἥλιος, romanized: helios, lit. 'sun') is a chemical element with the symbol He and atomic number 2. (Chemical element with the symbol He and atomic number 2) [100%] 2021-12-23 [Airship technology] [Helium]...
6. Helium: Template:Infobox helium Helium (He) is a colorless, odorless, tasteless, non-toxic, inert monatomic chemical element that heads the noble gas series in the periodic table and whose atomic number is 2. Its boiling and melting points are the lowest ... [100%] 2023-03-18 [Chemical elements] [Noble gases]...
7. Helium: Helium (from Greek: ἥλιος, romanized: helios, lit. 'sun') is a chemical element with the symbol He and atomic number 2. (Chemistry) [100%] 2022-08-11 [Helium] [Chemical elements]...
8. Helium: Helium (chemical symbol He, atomic number 2) is a minor component of the Earth's atmosphere, but it is the second most abundant element in the universe and second lightest of all known elements. It is a colorless, odorless, tasteless ... [100%] 2023-02-03
9. Helium: Helium, a gaseous chemical element, the modern discovery of which followed closely on that of argon. The Investigations of Lord Rayleigh and Sir William Ramsay had shown that indifference to chemical reagents did not sufficiently characterize an unknown gas as ... [100%] 2022-09-02
10. Helium: Helium (von altgriechisch ἥλιος hélios, deutsch ‚Sonne‘) ist ein chemisches Element und hat die Ordnungszahl 2. Sein Elementsymbol ist He. [100%] 2025-07-12
11. Helium flash: A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of low mass stars (between 0.8 solar masses (M☉) and 2.0 M ... (Brief thermal runaway nuclear fusion in the core of low mass stars) [70%] 2023-06-16 [Stellar evolution] [Astrophysics]...
12. Helium atom: A helium atom is an atom of the chemical element helium. Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with either one or two neutrons, depending on the isotope, held ... (Physics) [70%] 2023-12-29 [Atoms] [Quantum models]...
13. Helium Network: The Helium Network is a decentralized wireless Internet of things (IoT) network using the LoRaWAN system, tied to the cryptocurrency Helium Network Token (symbol HNT). Nodes on the network are generally owned and placed by individuals in their homes or ... (Wireless network linked to cryptocurrency) [70%] 2024-01-20 [2018 establishments] [Internet of things companies]...
14. Helium (cryptocurrency): File:LinxDotHeliumHotSpot.webm Helium is a cryptocurrency purposed as an incentive for users to set up nodes for a 4G wireless LAN (stylized as LoRaLAN: Long Range Local Area Network) for the Internet of Things (IoT). The network is global ... (Finance) [70%] 2024-01-02 [Cryptocurrencies] [Applications of cryptography]...
15. Helium compounds: Helium is the smallest and the lightest noble gas and one of the most unreactive elements, so it was commonly considered that helium compounds cannot exist at all, or at least under normal conditions. Helium's first ionization energy of ... (Chemistry) [70%] 2023-11-08 [Helium compounds] [Chemical compounds by element]...
16. Helium dating: Helium dating may refer to the traditional uranium–thorium dating (abbreviated U–Th/He dating) or to a variety of He diffusion methods that utilize the mobility of He atoms to determine the thermal history of a rock. Helium diffusion ... (Physics) [70%] 2023-10-17 [Radiometric dating]
17. Helium star: A helium star is a class O or B star (blue), which has extraordinarily strong helium lines and weaker than normal hydrogen lines, indicating strong stellar winds and a mass loss of the outer envelope. Extreme helium stars (EHe) entirely ... (Astronomy) [70%] 2022-12-11 [Star types] [B-type stars]...
18. Helium trimer: The helium trimer is a weakly bound molecule consisting of three helium atoms. Van der Waals forces link the atoms together. (Chemistry) [70%] 2022-12-25 [Helium compounds] [Allotropes]...
19. Helium cryogenics: In the field of cryogenics, helium is utilized for a variety of reasons. The combination of helium’s extremely low molecular weight and weak interatomic reactions yield interesting properties when helium is cooled below its critical temperature of 5.2 ... (Physics) [70%] 2024-01-20 [Cryogenics] [Helium]...
20. Helium compounds: Helium is the smallest and the lightest noble gas and one of the most unreactive elements, so it was commonly considered that helium compounds cannot exist at all, or at least under normal conditions. Helium's first ionization energy of ... (Class of improbable chemical compounds only formed at very high pressure or low temperature) [70%] 2024-01-21 [Helium compounds] [Chemical compounds by element]...
21. Helium planet: A helium planet is a planet with a helium-dominated atmosphere. This contrasts with ordinary gas giants such as Jupiter and Saturn, whose atmospheres consist primarily of hydrogen, with helium as a secondary component only. (Planet with helium-dominated atmosphere) [70%] 2024-04-21 [Hypothetical planet types] [Helium]...
22. Helium analyzer: A Helium analyzer is an instrument used to identify the presence and concentration of helium in a mixture of gases. In Technical diving where breathing gas mixtures known as Trimix comprising oxygen, helium and nitrogen are used, it is necessary ... (Instrument to measure the concentration of helium in a gas mixture) [70%] 2024-09-10 [Breathing gases] [Measurement]...
23. Helium dating: Helium dating (abbreviated (U–Th)/He dating) refers to a variety of He diffusion methods that utilize the mobility of radiogenic He atoms to determine the thermal history of a rock. Helium diffusion experiments are often used to help interpret ... (Radiometric dating method) [70%] 2024-11-19 [Radiometric dating]
24. Helium mass spectrometer: A helium mass spectrometer is an instrument commonly used to detect and locate small leaks. It was initially developed in the Manhattan Project during World War II to find extremely small leaks in the gas diffusion process of uranium enrichment ... (Physics) [57%] 2022-08-27 [Mass spectrometry] [Vacuum systems]...
25. Helium ionization detector: A helium ionization detector (HID) is a type of detector used in gas chromatography. HID connected to a GC has the great advantage to use helium as both the carrier gas and the ionization gas. (Physics) [57%] 2024-01-20 [Gas chromatography] [Helium]...
26. Helium line ratio: The brightness of an atomic spectral line emitted by atoms in a gas (or plasma) can be proportional to the gas's temperature, pressure or a weighted sum of both. Due to the completeness and accuracy of collisional radiative models ... (Physics) [57%] 2023-12-04 [Emission spectroscopy]
27. Helium release valve: A helium release valve, helium escape valve or gas escape valve is a feature found on some diving watches intended for saturation diving using helium based breathing gas. When saturation divers operate at great depths, they live under pressure in ... (Engineering) [57%] 2022-09-04 [Diving equipment]
28. Helium dilution technique: The helium dilution technique is the way of measuring the functional residual capacity of the lungs (the volume left in the lungs after normal expiration). This technique is a closed-circuit system where a spirometer is filled with a mixture ... (Medicine) [57%] 2024-01-07 [Respiratory therapy]
29. National Helium Reserve: The National Helium Reserve, also known as the Federal Helium Reserve, is a strategic reserve of the United States holding over 1 billion cubic meters (about 170,000,000 kg) of helium gas. The helium is stored at the Cliffside ... (Physics) [57%] 2023-12-04 [Helium]
30. Helium (Sia song): "Helium" is a song recorded by Australian singer-songwriter Sia for the Fifty Shades Darker soundtrack. The soundtrack was released in support of the 2017 film Fifty Shades Darker, an adaptation of the novel of the same name from the ... (Sia song) [57%] 2022-06-30 [2018 singles] [2016 songs]...
31. Helium-3: Template:Infobox isotope Helium-3 (He-3) is a light, non-radioactive isotope of helium with two protons and one neutron, rare on Earth, sought for use in nuclear fusion research. The abundance of helium-3 is thought to be ... [70%] 2023-03-26 [Isotopes of helium] [Nuclear fusion fuels]...
32. Helium-3: Helium-3 (He see also helion) is a light, stable isotope of helium with two protons and one neutron (in contrast, the most common isotope, helium-4 has two protons and two neutrons). Other than protium (ordinary hydrogen), helium-3 ... (Physics) [70%] 2023-12-10 [Isotopes of helium] [Nuclear fusion fuels]...
33. Helium-3: Algemeen Status Navigasie Helium-3 (2He) is 'n seldsame isotoop van die element helium. Dit word deur die verval van tritium gevorm. [70%] 2024-01-20
34. Helium-Blitz: Ein Helium-Blitz (englisch helium flash) ist die explosionsartige Fusion von Helium im Drei-Alpha-Prozess (Heliumbrennen). Dies kann geschehen im Kern von Sternen mittlerer Masse (bis zu 2,2 Sonnenmassen), an der Oberfläche weißer Zwerge oder als Schalenbrennen bei ... [70%] 2024-01-19
35. Antiprotonic helium: Antiprotonic helium is a three-body atom composed of an antiproton and an electron orbiting around a helium nucleus. It is thus made partly of matter, and partly of antimatter. (Physics) [70%] 2023-12-10 [Antimatter] [Atomic physics]...
36. Helium-4: Helium-4 (He) is a stable isotope of the element helium. It is by far the more abundant of the two naturally occurring isotopes of helium, making up about 99.99986% of the helium on Earth. (Physics) [70%] 2022-12-20 [Isotopes of helium]
37. Helium-3 refrigerator: A helium-3 refrigerator is a simple device used in experimental physics for obtaining temperatures down to about 0.2 kelvins. By evaporative cooling of helium-4 (the more common isotope of helium), a 1-K pot liquefies a small ... [57%] 2022-09-28 [Cryogenics] [Cooling technology]...