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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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Boron has two isotopes boron-10 and boron-11 whose percentage abundances are

19.6 \%

and

80.4 \%

respectively. What is the average atomic mass of boron?

View answer and explanation

Correct option: A

10.804 amu

Option A (10.804 amu) is correct because the average atomic mass is calculated by summing the product of each isotope's mass and its fractional abundance.

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