What is the atomic number of an element whose cation Y+ has the electronic configuration 1s² 2s² 2p6 3s¹? by Sunday | May 9 | Chemistry WAEC | 0 comments A. 9 B. 10 C. 11 D. 12 Correct Answer: Option C C. 11 Users Also Read These:An element X with electronic configuration 1s² 2s²…Which of the following elements has the electronic…The number of electronic shells contained in an atom…An element X has electron configuration 1s² 2s² 2p6…How many principal electronic shells has an atom…