What Element Is 4s2?
What Element Is 4s2? What element is 4s2? Answer and Explanation: A main group element with the valence electron configuration 4s2 4 s 2 is in periodic group 2 as the general valence electron configuration of… What element is 3s2? A B Phosphorous 1s2 2s2 2p6 3s2 3p3 Hydrogen 1s1 Helium 1s2 Lithium 1s2 2s1