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Element: xenon

Name : xenon

Symbol : Xe

Atomicnumber : 54

Relativeatomicmass : 131.293 (6) g, m [see note g

Standardstate : gas at 298 K

Appearance : colourless

Classification : Non-metallic

Groupinperiodictable : 18

Groupname : Noble gas

Periodinperiodictable : 5

Blockinperiodictable : p

Shellstructure : 2.8.18.18.8

CASRegistry : 7440-63-3

Description : Xenon is a "noble" or "inert" gas present in the atmosphere to a small extent. Xenon is present in the Martian atmosphere to the extent of about 0.08 ppm.