The mass number of three isotopes of an element are 11, 12, and 13 units. Their…
Chemistry · JEE Advanced · NTA Exams — Atomic Structure
The mass number of three isotopes of an element are 11, 12, and 13 units. Their percentage abundances 80, 15, and 5, respectively. What is the atomic weight of the element ?
- 11.25
- 20
- 16
- 10
Answer
(A) 11.25
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