Final answer:
A neutral atom of aluminum has the same number of protons and electrons, which is 13, due to its atomic number being 13.
Step-by-step explanation:
A neutral atom of aluminum has 13 protons and 13 electrons. Neutral atoms have an equal number of protons and electrons to balance the positive and negative charges, making the atom neutral. Since the atomic number represents the number of protons in an atom, it also indicates the number of electrons in a neutral atom.
For aluminum, which has an atomic number of 13, it must have 13 protons. So, to maintain a neutral charge, it needs to have 13 electrons as well. Thus, the answer to the question is that a neutral atom of aluminum has 13 electrons.