WAEC Chemistry 2019 Objective — Question 4
Question 4 of 50 from the West African Examinations Council (WAEC) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
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Which of the following elements has the highest ionization energy?
- A. Calcium
- B. Chlorine
- C. FluorineCorrect
- D. Magnesium
Explanation
Fluorine, being at the top right of the periodic table (small atomic radius, high nuclear charge, less electron shielding), has the highest first ionization energy of the four.
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