How can you use the periodic table to find the number of protons in one atom of an element? a: the number of protons is the same as the atomic number of the element. b: the number of protons is the same as the atomic weight of the element. c: the number of protons can be found by subtracting the number of electrons from the number of neutrons. d: the number of protons cannot be determined from the information of the periodic table.