- Xenon (Wikipedia)
Xenon is a chemical element; it has symbol Xe and atomic number 54. It is a dense, colorless, odorless noble gas found in Earth’s atmosphere in trace amounts. Although generally unreactive, it can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized.
- Bedrock (Wikipedia)
In geology, bedrock is solid rock that lies under loose material (regolith) within the crust of Earth or another terrestrial planet.