Krypton and Xenon are both noble gases that are found in the periodic table. They are both odorless, colorless, and tasteless gases that are used in a variety of applications. Krypton is used in lighting, while Xenon is used in medical imaging and lasers. Both gases are relatively rare in the atmosphere, with Krypton making up only 1 part per million and Xenon making up 0.09 parts per million.