Sodium's atomic number is 11. What does this tell you about an atom of sodium? A. It contains 11 neutrons. B. It contains 11 electrons. C. It has 11 protons to lose in ionic bonds. D. Its atomic mass is double this amount.
Atomic Number ALWAYS relates to number of protons. Sodium's atomic number is 11 so it has 11 protons in the neutral atom it also has 11 electrons in the balanced equation. So best answer would be B
