erick862 erick862 07-01-2020 Chemistry contestada What is the electron configuration of an element with atomic number 20? A. 1s^2 2s^2 2p^6 3s^2 3p^5 B. 1s^2 2s^2 2p^6 3s^2 3p^6 C. 1s^2 2s^2 2p^6 3s^2 D. 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 E. 1s^2 2s^2 2p^6
