An atom of element X has an electronic configuration of 1s²2p³3s²3p². In which group of the periodic table is X? by Sunday | Apr 19 | Chemistry NECO | 0 comments A. 0 B. 2 C. 3 D. 4 E. 5 Correct Answer: Option D – 5 Users Also Read These:The number of electronic shells contained in an atom…Element X, with electronic configuration 2, 8, 2 and…The electronic configuration of an element X is 1s²…The electronic configuration of an element is 1s²…How many principal electronic shells has an atom…