Respuesta:
1 Hidrógeno H 1, 1 1.00784(7) 0.084 g/l
2 Helio He 1, 18 4.002602(2) 0.17 g/l
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Respuesta:
1 Hidrógeno H 1, 1 1.00784(7) 0.084 g/l
2 Helio He 1, 18 4.002602(2) 0.17 g/l