Here's why:

* Noble gases are in Group 18 of the periodic table and are known for their stability due to having a full outer shell of electrons.

* Iodine is in Group 17, the halogens.

* Iodine has 53 electrons, while Xenon has 54 electrons.

* Xenon has one more electron than iodine, making it the closest noble gas in terms of electron configuration.