H:1s1;He:1s2;Li:1s2 2s1;Be:1s2 2s2;B:1s2 2s2 2p1;C:1s2 2s2 2p2;N:1s2 2s2 2p3;O:1s2 2s2 2p4;F:1s2 2s2 2p5;Ne:1s2 2s2 2p6;Na:1s2 2s2 2p6 3s1Mg:1s2 2s2 2p6 3s2;Al:1s2 2s2 2p6 3s2 3p1; Si:1s2 2s2 2p6 3s2 ...