Which of the following Group 1 elements has the highest ionization energy? by Sunday | Aug 22 | Chemistry WAEC | 0 comments A. 55Cs B. 37Rb C. 19K D. 11Na E. 3Li Correct Answer: Option E – 3Li Users Also Read These:In which of the following series are the atoms…Which of the following statements is correct about…Which of the following substances has the highest…Which of these arrangement of elements is in order…The ionization energy is affected by the following…