Which of the following elements has a ground state electronic configuration with an incomplete penultimate shell? by Sunday | May 12 | Chemistry WAEC | 0 comments A. Iron B. Sodium C. Aluminium D. Calcium Correct Answer: Option A A. Iron Users Also Read These:An atom of element X has an electronic configuration…Which of the following cannot be deduced from the…Electronic configuration of an elements 13x in the…What is the valence shell electron configuration of…Element X, with electronic configuration 2, 8, 2 and…