WAEC Chemistry 2020 Objective — Question 41

Question 41 of 50 from the West African Examinations Council (WAEC) Chemistry 2020 Objective paper, with the correct answer and a full explanation.

Which of the following arrangement of elements is in decreasing order of electronegativity? A. Na, Mg, Al, Si, P B. Na, Al, Mg, P, Si C. P, Mg, Na, Si, Al D. P, Si, Al, Mg, Na

A. Na, Mg, Al, Si, P
B. Na, Al, Mg, P, Si
C. P, Mg, Na, Si, Al
D. P, Si, Al, Mg, NaCorrect

Explanation

Electronegativity decreases from right to left across the periodic table (increases from left to right) and decreases down the group. Thus, arranging in decreasing electronegativity: P, Si, Al, Mg, Na.

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