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Questions asked by users might not always be phrased in the clearest way.
Y is the most electronegative element based on the given electron configurations.
Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. It increases from left to right across a period and decreases down a group. Among the given elements, Y has the highest atomic number and is located in the top right corner of the periodic table. Therefore, it has the greatest electronegativity value.
The order of electronegativity from highest to lowest is: Y > X > W > V.