Krypton is a GAS and an ELEMENT that is found in the periodic table. It is represented by the symbol Kr and has an atomic number of 36. Krypton is a colorless, odorless, and tasteless GAS that is found in trace amounts in the Earth's atmosphere. It is also used in some types of lighting and photography. Krypton is one of the noble gases, meaning it is unreactive and does not form compounds with other elements.