The noble gas that comes before iodine is krypton.
Iodine will gain one electron to form iodide anion which has the electronic configuration of the nearest noble gas (xenon): [Kr] 5s2 4d10 5p6 or 2, 8, 18, 18, 8.
I- ion (iodine ion and not iodine) and xenon will have the same number of electrons (54 electrons)
The noble gas nearest to Phosphorus (P) is Argon (Ar).
iodine
The noble gas that comes before iodine is krypton.
Argon (Ar) is the nearest noble gas to potassium.
Iodine will gain one electron to form iodide anion which has the electronic configuration of the nearest noble gas (xenon): [Kr] 5s2 4d10 5p6 or 2, 8, 18, 18, 8.
I- ion (iodine ion and not iodine) and xenon will have the same number of electrons (54 electrons)
[Kr]4d105s25p5
[Kr]4d105s25p5
The noble gas nearest to Phosphorus (P) is Argon (Ar).
iodine
This gas is neon.
Iodine is a non-metal. It belongs to group 17 (halogen family).
Iodine accepts one electron to achieve noble gas configuration. Strontium loses two electrons to achieve noble gas configuration. Nitrogen accepts three electrons to achieve noble gas configuration. Krypton already has a noble gas configuration.
Iodine is not a "nobel" gas or even a noble gas but rather a nonmetal element that is not a gas at all at standard temperature and pressure, but a solid instead. -- Unlike the elements in the noble gas group such as neon, which are chemically very unreactive, iodine is quite reactive, like the other elements in its group such as fluorine and chlorine.