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Z=10 : 1S2, 2S2, 2P6
Z=19 : 1S2,2S2,2P6, 3S2,3P6, 4S1
Z=13 : 1S2,2S2,2P6, 3S2, 3P1
Z=22 : 1S2,2S2,2P6, 3S2,3P6, 4S2, 4P2