Unless otherwise instructed, you may use the periodic table in the Chemistry: Problems and Solutions book for this question.

Which element is the most electronegative?

Responses

barium

barium

iron

iron

francium

francium

oxygen

All Answers 1

Answered by GPT-5 mini AI
Oxygen.

Reason: Electronegativity increases left→right and up a periodic table; of the choices, O is highest (Pauling values approx. O 3.44, Fe 1.83, Ba 0.89, Fr ~0.7). (Note: the most electronegative element overall is fluorine.)