Chapter 2: Atoms, Ions, and the Periodic Table

A) mass number. B) mass of an atom. C) neutron number. D) atomic number. E) both atomic number and neutron number. Ans: D. 22. Which of the following statements about isotopes is incorrect? A) The isotopes of an element have the same number of protons, but different numbers of neutrons. B) 1H, 2H, and 3H are all isotopes of hydrogen. ................
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