WAEC Chemistry 2013 Objective — Question 5

Question 5 of 50 from the West African Examinations Council (WAEC) Chemistry 2013 Objective paper, with the correct answer and a full explanation.

Which of the following statements is correct?

A. Atomic size decreases down the group
B. Atomic size increases across the period
C. Anions are smaller than the parent atom
D. Cations are smaller than the parent atomCorrect

Explanation

Atomic radius decreases across the period and increases down the group. Also, anions are larger than the parent atoms while cations are smaller than the parent atom.

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