Which characteristic of an element determines its placement in the periodic table? O A. number of protons O B. size O C. mass O D. number of neutrons​

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons