I assume you mean the Nobel gas electron configuration abbreviation for barium.
[Ne] 6s2
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The element with the noble gas notation Xe6s2 is Barium (Ba), as Xenon (Xe) represents the 5s and 5p orbitals of the previous noble gas configuration, and the 6s represents the outermost electron shell of Barium.
The noble gas notation is a notation formed as a result of the electron configuration notation being used in conjunction with noble gases. The noble gas preceding the element in question is written then the electron configuration is continued from that point forward. The notation is shorter to write and makes it easier to identify elements. The noble gas notation starts for elements after helium. For example, the electronic configuration of carbon is 1s2 2s2 2p2, whereas its noble gas notation is [He] 2s2 2p2.
The noble gas notation is a notation formed as a result of the electron configuration notation being used in conjunction with noble gases. The noble gas preceding the element in question is written then the electron configuration is continued from that point forward. The notation is shorter to write and makes it easier to identify elements. The noble gas notation starts for elements after helium. For example, the electronic configuration of carbon is 1s2 2s2 2p2, whereas its noble gas notation is [He] 2s2 2p2.
There is no boble gas notation for hydrogen and helium. The noble gas notation starts for elements after helium. The noble gas notation is a notation formed as a result of the electron configuration notation being used in conjunction with noble gases. The noble gas preceding the element in question is written then the electron configuration is continued from that point forward.
The noble gas notation for the electron configuration of iron (Fe) is [Ar] 3d6 4s2, where [Ar] represents the electron configuration of the noble gas argon.
[He] 2s1
[Ne] 3s2 3p6
[He] 2s1
Electronic configuration of beryllium: 1s2.2s2
[He] 2s1
The noble gas notation for Xenon is [Kr] 4d^10 5s^2 5p^6. This notation represents the electron configuration of Xenon with the closest noble gas element, Krypton, in brackets followed by the configuration for Xenon.
There is no noble gas with the same electronic configuration as the element barium (Ba). But Ba2+ ion and the noble gas xenon (Xe) will have the same number of electrons (54 electrons each).