Question

An element has 2 isotopes. The mass of one isotope is A-1 and other is A+2. If the average is A. Find the percentage of isotope A-1 in the element.

Answer 1

Answer:

(A + 2) respectively. The average atomic mass is A . Calculate the mole percentage of the heavier isotope. ... An element has two isotopes with atomic masses (A−1) and (A+3) respectively. The average atomic ... 4x=300. x=75%. ∴% of heavier isotype =(100−75)%. =25%

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