Here's why:

* Atomic Number: The number of protons in an atom's nucleus defines its atomic number.

* Sulfur (S): Sulfur has an atomic number of 16, meaning it has 16 protons.

* Iodine (I): Iodine has an atomic number of 53, meaning it has 53 protons.

Therefore, iodine has a significantly higher number of protons than sulfur.