The common property of iodine and naphthalene is that they are both sublimable solids. This means that they can transition directly from a solid state to a gaseous state, skipping the liquid state, when heated.

Here's a breakdown:

* Iodine: Iodine is a dark purple solid at room temperature. When heated, it vaporizes into a purple gas, a process often used to purify iodine.

* Naphthalene: Naphthalene is a white solid commonly found in mothballs. When heated, it sublimes, producing a pungent odor.

Other similarities:

* Both are organic compounds: Iodine is a halogen, while naphthalene is a hydrocarbon.

* Both have relatively low melting points: This contributes to their sublimability.

Key difference:

* Chemical structure: Iodine is an element, while naphthalene is a complex organic molecule.

Let me know if you have any other questions.