JAMB Chemistry 2017 Objective — Question 20

Question 20 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2017 Objective paper, with the correct answer and a full explanation.

¹⁹₉F + X → ²²₁₁Na + ¹₀n. In the equation above, X represents

• A. A. a proton (¹₁P)
• B. B. an electron (⁻⁰₋₁e)
• C. C. a neutron (¹₀n)
• D. D. an alpha particle (⁴₂He)Correct

Explanation

Balancing mass and atomic numbers shows X must be an alpha particle (⁴₂He).

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