What is the mass number of an atom with 6 protons, 8 neutrons, 6 electrons? 14. What must the isotope of a given element have the same? Atomic number. What is the structure of a Krypton-85 atom? 36 electrons, 36 protons, 49 neutrons. Isotopes are atoms that have the same atomic mass but different amounts of what? read more
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