Question: an atom of the isotope 133cs contains how many protons (p) neutrons (n) and electrons (e)?
Answer: d) An atom of the isotope 133 Cs + contains 55 protons, 133 neutrons, and 56 electrons. e) An atom of the isotope 45 Sc 3+ contains 21 protons, 24 neutrons, and 24 electrons.