Final answer:
The condensed (noble-gas) electron configuration of iodine is [Kr]5s2 4d10 5p5.
Step-by-step explanation:
The condensed (noble-gas) electron configuration of iodine is [Kr]5s24d105p5.
To write the condensed electron configuration of iodine, we start by finding the noble gas that comes before iodine in the periodic table. In this case, krypton (Kr) is the noble gas that comes before iodine. The electron configuration of krypton is [Kr] = 1s22s22p63s23p64s23d104p6.
Next, we write the remaining electrons of iodine after the noble gas electron configuration. Iodine has 53 electrons, so we add 5 more electrons after the krypton electron configuration: 5s24d105p5. Putting it all together, the condensed (noble-gas) electron configuration of iodine is [Kr]5s24d105p5.