1. The problem statement, all variables and given/known data Choose the element in each of the sets you would expect to have the highest IE2. a. K b. Be c. Mg d. Ca e. Al 2. Relevant equations The correct answer is K 3. The attempt at a solution I do not understand why it is K ...I kind of guessed by using my Ionization Energy diagram that shows the trend on the periodic table as: --------> IE increases across a period/row | | | IE decreases down a group Can someone please explain why K is correct?