WAEC Chemistry 2013 Objective — Question 12

Question 12 of 50 from the West African Examinations Council (WAEC) Chemistry 2013 Objective paper, with the correct answer and a full explanation.

In which of the following series are the atoms arranged in order of increasing ionization energy?

A. Li, Na, K
B. B, Be, Li
C. C, O, F, NeCorrect
D. Be, Mg, Ca

Explanation

Ionization energy increases across the period and decreases down the group. C, O, F, Ne (across period 2, in increasing group) is arranged in increasing ionization energy.

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