bromine ⟵ {\displaystyle \longleftarrow } 36 ⟶ {\displaystyle \longrightarrow } rubidium Wikipedia logo The Simple English Wikipedia has an article on: Krypton Pronunciation enPR: krĭp'tŏn, IPA (key): /ˈkrɪptɒn/ Audio (UK)(file) Hyphenation: kryp‧ton Noun Singular krypton Plural none (uncountable) Krypton is a gas element on the periodic table with atomic number 36 and the symbol Kr. Wikiwand - on Seamless Wikipedia browsing. On steroids.