First Uses of the Periodic Table Element - Krypton. Unveiling the Mystery of Krypton: An Inactive Hero.Krypton, a rare noble gas element, holds a fascinating place in history and science due to its unique properties. It was first discovered in 1898 by Sir William Ramsay and Morris Travers, but it took several more decades for its true potential to be fully appreciated. Initially, krypton found use in some specific applications due to its inertness and spectral characteristics. However, as science progressed and better alternatives emerged, krypton's applications dwindled, rendering it an inactive hero.