How many principal electronic shells has an atom whose electronic configuration is shown below? 1s² 2s² 2p6 3s¹. By: Sunday|Published on: Aug 24|Categories: Chemistry WAEC| 0 comments A. 1 B. 2 C. 3 D. 4 E. 11 Correct Answer: Option C – 3 Users Also Read These:Given that the electronic configuration of an…Electronic configuration of an elements 13x in the…How many unpaired electrons are there in an atom of…An element Y has the electronic configuration 1s²…What is the electronic configuration of an element…SEE ALSO Reduction of nitroalkanes; nitrites and amides is a route for the preparation of?