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Helium is used as an inert-gas atmosphere for welding metals such as aluminum; in rocket propulsion (to pressurize fuel tanks, especially those for liquid hydrogen, because only helium is still a gas at liquid-hydrogen temperature); in meteorology (as a lifting gas for instrument-carrying balloons); in cryogenics (as a coolant because liquid ...
Element Helium (He), Group 18, Atomic Number 2, s-block, Mass 4.003. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Explore the versatile world of Helium, the second most abundant element in the universe. Learn about its physical and chemical properties, historical background, and varied applications in healthcare, industry, and everyday life.
Chemical Properties. Helium is an inert (Nobel) gas under all standard conditions [5]. In plasma form or subjected to electron bombardment, helium can from unstable compounds with certain metals including, sulfur, iodine, phosphorus and tungsten. These compounds are termed as excimers.
Helium (from Greek: ἥλιος, romanized: helios, lit. 'sun') is a chemical element; it has symbol He and atomic number 2. It is a colorless, odorless, non-toxic, inert, monatomic gas and the first in the noble gas group in the periodic table.
Helium’s high thermal conductivity and non-flammable properties allows for precise and efficient welding and cutting processes, resulting in cleaner and higher-quality welds with fewer defects. As helium might enable higher flow rates, this could increase welding speeds in some circumstances.
31 gru 2009 · Although helium is part of the atmosphere, it is not economical to extract it from liquid air. Uses. A quarter of the helium produced is used as a coolant for super-conducting magnets in MRI instruments. Another major use is as an inert atmosphere for welding air-sensitive metals.
