* 13 protons: These give aluminum its atomic number of 13 and its identity as aluminum. Protons are positively charged particles.

* 14 neutrons: The number of neutrons can vary, creating isotopes of aluminum. The most common isotope of aluminum has 14 neutrons. Neutrons have no charge.

Important notes:

* Electrons: While not located in the nucleus, aluminum atoms also have 13 electrons orbiting the nucleus. These electrons are negatively charged and balance out the positive charge of the protons.

* Atomic Mass: The combined number of protons and neutrons determines the atomic mass of an atom. So, the most common isotope of aluminum has an atomic mass of 27 (13 protons + 14 neutrons).

Let me know if you have any more questions about atoms!