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Xenon 
Xenon which is also called Stranger Gas 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. Naturally occurring xenon consists of eight stable isotopes. It is a colorless gas, exhibiting a blue glow when placed in a high voltage electric field. 

Symbol: Xe 
Electron configuration: [Kr] 4d105s25p6 
Atomic number: 54 
Electrons per shell: 2,8,18,18,8 
Boiling point: -108.1 °C 
Discovered: 1898 
Atomic mass: 131.293 ± 0.006 u

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