Helium is odourless, extremely light and, unlike another very light element once used in airships, hydrogen, it willl never burst into flames. When cooled, it only condenses into a liquid at the stunningly low temperature of roughly 4.2 Kelvin, or -269C/-452F. Plus, under normal atmospheric conditions, helium will not freeze even at temperatures as low as absolute zero, or 0 Kelvin (-273C/-460F). This makes it incredibly useful. https://www.bbc.com/future/article/20250331-why-helium-shortages-are-worrying-the-world #UPSC #UPSCPrep #UPSC2025 #UPSCMains #UPSCPrelims #UPSCExam
April 2, 2025 385 1
