Which of the following elements has the highest ionization energy? By: Sunday|Published on: Mar 16|Categories: Chemistry WAEC| 0 comments A. Calcium B. Chlorine C. Flourine D. Magnesium Correct Answer: Option D – Magnesium Users Also Read These:Which of the following Group 1 elements has the…How are ionization energies related to the…If an element with high electron affinity combines…Which of the following arrangements indicates the…Which of these arrangement of elements is in order…SEE ALSO Ethene is produced from ethanol by?