What is the atomic number of an element whose cation Y+ has the electronic configuration 1s² 2s² 2p6 3s¹? By: Sunday|Published on: May 9|Categories: Chemistry WAEC| 0 comments A. 9 B. 10 C. 11 D. 12 Correct Answer: Option C C. 11 Users Also Read These:An element having the atomic number 17 will resemble…The electronic configuration of element Z is 1s² 2s²…The electronic configuration of an element X is 1s²…What type of bond exits between an element X with…An element of nucleon number P and atomic number Q…SEE ALSO By what amount must the temperature of 200cm3 of Nitrogen at 27°C be increased to double the pressure if the final volume is 150cm3 (Assume ideality)