[Ne]3s2
The noble gas notation of magnesium is [Ne] 3s2. This shows that the third energy level is the highest occupied energy level and magnesium is in period 3 of the periodic table. Also there are two valence electrons for magnesium in the s orbital.
Magnesium element has no relation with noble gas. But Mg2+ ions and noble gas neon are isoelectronic.
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 starts for elements after helium. Helium has no noble gas notation. Its electronic configuration is 1s2
The noble gas notation for xenon is [Kr] 5s2 4d10 5p6.
[Ne] 3s2
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 for Berkelium (Bk) is [Rn] 5f^9 7s^2.
The noble gas notation for carbon uses neon as the previous noble gas. Carbon ([He] 2s^2 2p^2) can be written in noble gas notation as [He] 2s^2 2p^2.
The noble gas configuration of magnesium is [Ne] 3s^2. This indicates that magnesium has the same electron configuration as the nearest noble gas, neon, with an outer shell containing 2 electrons in the 3s orbital.
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 for germanium is [Ar] 3d¹⁰ 4s² 4p².