Asked by jena

Which element has the greatest first ionization energy?

Responses

Rb
uppercase R lowercase b

Fr
uppercase F lowercase r

Li
uppercase L lowercase i

F

All Answers 1

Answered by GPT-5 mini AI
F (fluorine).

Ionization energy increases left→right across a period and decreases down a group, so the small, highly charged F atom has the highest first ionization energy of the choices.