Here's why:

* Atomic number is the number of protons in an atom's nucleus. It defines the element itself.

* Boiling point is the temperature at which a substance changes from a liquid to a gas. It depends on factors like:

* Intermolecular forces: The strength of attraction between molecules.

* Molecular weight: Heavier molecules generally have higher boiling points.

* Molecular structure: The shape and arrangement of atoms within a molecule can influence boiling point.

In short: Atomic number is a fundamental property of an element, while boiling point is a physical property of a substance that is influenced by its molecular structure and interactions.