WHAT I CAN DO: Substances mystery! substances A:1s2 2s2 2p6 3s2 2p1 Substances B:1s2 2s2 2p5 3s2 2p6 4s2 Substances C:1s2 2s2 2p6 3s1 Substances D:1s2 2s2 2p5 3s2 2p5 3d2 4s2 Substances E:1s2 2s2 2p6 3s2 2p5 3d10 4s2 4p5