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WAEC Chemistry 2025 Theory — Question 11

Question 11 of 70 from the West African Examinations Council (WAEC) Chemistry 2025 Theory paper, with the correct answer and a full explanation.

1(g). An element is represented as (a over b)X, where X is the symbol of the element. What do the letters a and b represent?

Model answer

a = mass number/atomic mass; b = atomic number/proton number.

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