[Ne]3s23p4
The noble gas configuration of sulfur is [Ne]3s2 3p4. It represents the electron configuration of sulfur when it has achieved a stable electronic configuration similar to the nearest noble gas, neon.
[noble gas]ns2 np6
By acquiring noble gas configuration elements become stable .
The core electron configuration of sulfur is [Ne] 3s^2 3p^4, where [Ne] represents the electron configuration of the noble gas neon. This indicates that sulfur has a full 3s subshell and 4 electrons in the 3p subshell within its core electron configuration.
Aluminum is [Ne]3s23p1 Sulfur is [Ne]3s23p4
The noble gas that has the same electron configuration as sulfur with a 2- charge (S²⁻) is argon. When sulfur gains two electrons to become S²⁻, its electron configuration becomes 1s² 2s² 2p⁶ 3s² 3p⁶, which is identical to that of argon. Thus, both sulfur 2 minus and argon have the same electron arrangement, making them isoelectronic.
it only fills the S sublevel
The group attains electron configuration of noble gases by gaining one electron is the halogens. They have seven valence electrons and need one more electron to complete their outer shell, resulting in a full valence shell like the noble gases.
Noble gases have a stable electron configuration. So they are less reactive.
Sulfur atoms will gain two electrons in order to achieve a noble gas electron configuration. A sulfide ion has the formula S2-.
All of the noble gasses have full outer electron shells - rendering them extremely nonreactive. Their electron configuration is what places them in the group on the periodic table that we have designated "noble gases".
The group of elements that have a stable electron configuration are the noble gases.