An element with atomic mass Z consists of two isotopes of mass number Z - 1 and Z + 2…
Chemistry · JEE Main · NTA Exams — Some Basic Concepts in Chemistry
An element with atomic mass Z consists of two isotopes of mass number Z - 1 and Z + 2. The percentage abundance of the heavier isotope is:
- 66.6
- 33.3
- 75
- 0.25
Answer
(B) 33.3
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