The noble gas that comes before iodine is krypton.
The noble gas that comes before bromine is argon.
I- ion (iodine ion and not iodine) and xenon will have the same number of electrons (54 electrons)
iodine
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.
The noble gas that comes before bromine is argon.
[Kr]4d105s25p5
[Kr]4d105s25p5
I- ion (iodine ion and not iodine) and xenon will have the same number of electrons (54 electrons)
iodine
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.
Krypton is the noble gas before tellurium.
Argon is the noble gas that comes in the periodic table after chlorine.
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.
Full form: 1s1. it doesn't have noble gas configuration as there is no noble gas before hydrogen