WAEC Chemistry 2023 Objective — Question 20
Question 20 of 50 from the West African Examinations Council (WAEC) Chemistry 2023 Objective paper, with the correct answer and a full explanation.
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Going down group II in the periodic table normally
- A. shielding effect increasesCorrect
- B. melting point increases
- C. ionization energy increases
- D. electronegativity increases
Explanation
Going down group II: shielding effect increases; melting point decreases; ionization energy decreases; electronegativity decreases. Only 'shielding effect increases' (option A) is a correct trend among those listed — the other three options describe the opposite of the actual trend.
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