Isotope A contains 56 protons and 80 neutrons. Isotope B contains 55 protons and 81 neutrons. Isotope C contains 57 protons and 80 neutrons. Isotope D contains 56 protons and 74 neutrons. Which are isotopes of the same element?

Respuesta :

Answer:

isotope A and isotope D

Explanation:

why they contains the same number of protons