How many protons are in a neutral atom of sodium (Na)?

In a neutral atom of sodium (Na), the number of protons is equal to its atomic number, which identifies the element. The atomic number of sodium is 11, meaning that sodium has 11 protons in its nucleus. Since the atom is neutral, it will also have 11 electrons, balancing the positive charge of the protons with an equal number of negative charges from the electrons. This fundamental relationship allows us to determine the specific identity of an element, as the number of protons defines what element it is in the periodic table. Therefore, a neutral atom of sodium contains 11 protons.