The average atomic mass of an element is the weighted average of the masses of its isotopes, where the weights are their natural abundances. This principle is used to determine the relative abundance of isotopes if the average atomic mass and isotopic masses are known.
The relative atomic mass of boron (which exists in two isotopic forms 10B and 11B) is 10·81. What will be the abundance of 10B and 11B, respectively (consider a sample of 100 atoms) ?
Asked in UPSC NDA 1 2024 · Topic: Atomic Structure (Isotopes, Isobars, and Isotones)
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