Xenon and Krypton are both gases that are part of the noble gas group on the periodic table. Xenon is a colorless, odorless, and tasteless gas that is found in the Earth's atmosphere in trace amounts. Krypton is also a colorless, odorless, and tasteless gas that is found in the Earth's atmosphere in trace amounts. Both gases are used in a variety of applications, including lighting, lasers, and medical imaging.