Xenon (Xe), element 54 – Learn Acer periodic table

Xenon

Noble gas, atomic number 54.

Xenon is a chemical element with symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas, that occurs in the Earth's atmosphere in trace amounts. Although generally unreactive, xenon can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized.

Facts

Symbol Xe. Atomic mass 131.2936 u. Group 18, period 5. Electron configuration [Kr] 4d10 5s2 5p6. Electrons per shell 2, 8, 18, 18, 8. State at room temperature: Gas. Melting point -111.7 °C, boiling point -108.1 °C. Discovered by William Ramsay.

Element data from Wikipedia, CC BY-SA 3.0.