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1s²
2s² 2p⁶
3s² 3p⁶ 3d¹⁰
4s² 4p⁶ 4d¹⁰ 4f¹⁴
5s² 5p⁶ 5d⁹
6s¹
PERIODO = 6
GRUPO = VIII B
VALENCIA = 2, 4
subnivel = 6s
6s1 = _↑__