WAEC Chemistry 2013 Objective — Question 4

Question 4 of 50 from the West African Examinations Council (WAEC) Chemistry 2013 Objective paper, with the correct answer and a full explanation.

An atom of an element X gains two electrons. The symbol of the ion formed is

A. X⁺
B. X²⁺
C. X²⁻Correct
D. X⁻

Explanation

When atom gains electron(s), it becomes negatively charged. The magnitude of the negative charge equals the number of electrons gained. Thus, when X gains two electrons, the ion formed is X²⁻.

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