How many unpaired electrons are there in an atom of an element with the following electronic configuration? 1s²2s² 2p6 by Sunday | Aug 21 | Chemistry WAEC | 0 comments A. o B. 1 C. 2 D. 6 E. 8 Correct Answer: Option A – o Users Also Read These:How many principal electronic shells has an atom…The electronic configuration of an element is 1s²…What is the atomic number of an element whose cation…An element Y has the electronic configuration 1s²…The number of electronic shells contained in an atom…