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Boron occurs in nature in the form of two isotopes ${{11}_{5}}$B and ${{10}_{5}}$B in ratio of 81% and 19% respectively. Calculate its average atomic mass
CBSE Class 11
CBSE Class 11 Chemistry
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prasanna
August 9, 2016, 7:59am
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Average atomic weight = 11x81+10x19/100=10.81