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The relative abundance of two rubidium isotopes of atomic weight 85 and 87 are 75% and 25% respectively. The average atomic weight of rubidium is ? a)75.5 b)85.5 c)87.5 d)86.5 |
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Answer» The relative abundance of two rubidium isotopes of atomic weight 85 and 87 are 75% and 25% respectively. The average atomic weight of rubidium is ? a)75.5 b)85.5 c)87.5 d)86.5 |
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