Electron configurations for all the group 18 noble gases have eight electrons in their valence shell in common.
Noble gases are the gases that contain Eight electrons in their valence shells and are placed in Group 18 of the periodic table. The octet of Noble gases is complete. They are inert in nature since they have complete valence shells. They are not much abundant in nature due to their inert behaviour.
They are stable and realtively unreactive as compared to other members of the peiodic table.
Some other factors that remain common for noble gases:
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