50 If the electron configuration of a ground state sodium atom is 1s22s22p63s1, the electron configuration of the sodium cation (Na+) woul 1s2s2p63s 1s2s2p6 1s2s2p63s 1s2s2p63s none of the above O 0.1 points How many core electrons are in a chlorine atom? 17 1 7 10 2 W S 43 29. E S R 5 7 200 NM