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May 2023 1 2 Report
Un átomo neutro que tiene como configuración electrónica:1s2 2s2 2p6 3s2 3p1; pertenece al periodo y grupo. *
a) 3:IIA
b) 3:IIB
c) 3:IA
d) 3:IIIA
e)3:IVA

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