E PRA HJJ ME AJUDEM ESSA E A ULTIMA QUESTAO!!! Os nomes das familias 1A, 7A, E 8A sao respectivamente:
A) Gases nobres, metais alcalinos, halogenios
B) Metais alcalinos, halogenios, gases nobres
C) Calcogenios, halogenios, gases nobres
D) Halogenios, gases nobres, metais alcalinos
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