1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁵

Here's how it breaks down:

* Principal Energy Levels (Shells): The numbers (1, 2, 3, 4, 5) indicate the electron shells.

* Subshells: The letters (s, p, d) represent the subshells within each shell.

* Electrons: The superscripts (², ⁶, ¹⁰, ⁵) indicate the number of electrons in each subshell.

Explanation:

* Iodine has 53 electrons.

* The configuration follows the Aufbau principle, filling orbitals in order of increasing energy.

* The last electron enters the 5p subshell, which has 5 available spots. Since iodine has 53 electrons, its 5p subshell has 5 electrons.

Let me know if you'd like a more visual explanation of the configuration!