How many principal electronic shells has an atom whose electronic configuration is shown below? 1s² 2s² 2p6 3s¹. by Sunday | Aug 24 | Chemistry WAEC | 0 comments A. 1 B. 2 C. 3 D. 4 E. 11 Correct Answer: Option C – 3 Users Also Read These:The bond formed between two elements with electron…An element with the electron configuration of 1s²…The electronic configuration of element Z is 1s² 2s²…How many unpaired electrons are there in an atom of…What is the atomic number of an element whose cation…