Which of the following atoms has the highest electronegativity? (optional) use the periodic table to answer this question

a. C

b. N

c. O

d. F

The trend of electronegativity in the periodic table is decreasing from right to left and top to bottom. In the given elements, all of these are in the row two which means, it is just a matter of arrangement of these elements. In reference with the periodic table, the arrangement in increasing order is A, B, C, D. Hence the answer is D.