Post-UTME Chemistry 2005 Objective — Question 14
Question 14 of 27 from the Post-UTME Screening (Post-UTME) Chemistry 2005 Objective paper, with the correct answer and a full explanation.
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The ion X contains 23 particles in the nucleus and 10 electrons outside the nucleus. What does the nucleus of the ion X contain?
- A. Protons 10, Neutrons 13
- B. Protons 11, Neutrons 12Correct
- C. Protons 12, Neutrons 11
- D. Protons 13, Neutrons 10
Explanation
A sodium (Na) atom, mass number 23, has 11 protons and 12 neutrons; losing one electron to form Na+ gives 10 electrons, matching the description.
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