HiSET Science Test Prep

Answer: Oxygen

Electronegativity describes the tendency of an atom to attract electrons in a covalent bond. In general, electronegativity increases going across periods and up groups. Thus, the elements in the top right corner of the periodic table are the most electronegative. In the context of the question, oxygen is the only element in this area of the periodic table, and it is the most electronegative.