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:Element X, with electronic configuration 2, 8, 2 and…The ground stated energy for the hydrogen atom is…The height at which the atmosphere ceases to exist…Which of the following cannot be deduced from the…How many principal electronic shells has an atom…