Short Answer 
To compare the electronegativity of three elements, start by identifying their electronegativity values, then calculate the differences between each pair of elements. Finally, analyze these differences to rank the elements from most to least electronegative.
Step 1: Identify Electronegativity Values
Begin by gathering the electronegativity values for the three elements you are examining, let’s label them as A, B, and C. These values can typically be found on the periodic table or through reliable scientific resources. Ensuring you have the accurate values is crucial for proper comparison.
Step 2: Calculate Electronegativity Differences
Next, calculate the differences in electronegativity between each pair of elements. Specifically, you will compute:
- Difference between A and B
- Difference between B and C
- Difference between A and C
Step 3: Compare the Differences
Finally, analyze the calculated differences to determine the relative electronegativity of the three elements. By comparing the differences, you can rank the elements in terms of their ability to attract electrons, thus inferring which element is the most electronegative and which is the least.