Respuesta:
1s2
2s2
2p6
3s2
3p6
4s2 3d10
4p6
5s2. 4d10
5p6. 4f14
6s2. 5d10
6p6. 5f14
7s2. 6d10
7p6
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Respuesta:
1s2
2s2
2p6
3s2
3p6
4s2 3d10
4p6
5s2. 4d10
5p6. 4f14
6s2. 5d10
6p6. 5f14
7s2. 6d10
7p6