felipe0387 24/03/2018 A) 12Mg: 1s2,2s2,2p6,3s2.B)20Ca: 1s2,2s2,2p6,3s2,3p6,4s2.C)26Fe: 1s2,2s2,2p6,3s2,3p6,4s2,3d6.
felipe0387
A) 12Mg: 1s2,2s2,2p6,3s2.
B)20Ca: 1s2,2s2,2p6,3s2,3p6,4s2.
C)26Fe: 1s2,2s2,2p6,3s2,3p6,4s2,3d6.