The periodic table of elements tells you how many __________ each atom has. (Choose all that apply)

The periodic table of elements tells you how many protons each atom has.

Additionally, with an understanding of the atomic number (which equals the number of protons), you can also infer the number of electrons in a neutral atom, since they are equal in number to protons.

The number of neutrons is not directly indicated on the periodic table, as it depends on the isotope of the element, which can vary.

So, the correct answers would be protons and electrons (for neutral atoms).