Home ยป The electronic configuration of an atom having atomic number 20 is Atomic Structure MCQs The electronic configuration of an atom having atomic number 20 is January 8, 2022 21 Views Q. The electronic configuration of an atom having atomic number 20 is A. 2, 8, 8, 2 B. 2, 8, 10 C. 2, 6, 8, 4 D. 2, 4, 8, 6 Answer: 2, 8, 8, 2