Dadas las siguientes configuraciones electrónicas, indique, razonadamente, si pertenecen a átomos en estado fundamental, excitado o imposible.
(2s)X2 (2p)X2 (1s)X2 (2s)X2 (2p)X3 (1s)X2 (1p)X1 (2s)X2 (1s)X2 (2s)X2 (2p)X6 (3s)X2 (3p)X6 (3d)X1 (1s)X2 (2s)X2 (2p)X6 (3s)X2 (3p)X6 (3d)X1 (3f)X1