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Isotope Abundance Calculator
Given two isotope masses and the average atomic mass, find the natural percentage of each isotope.
Calculator
Results update as you type. Every step of the working is shown below.
Examples:
Result
Enter values above — the answer appears here instantly, with full working.
Formula used
x·m_A + (1 − x)·m_B = Aᵣ
Every result substitutes your values into this relation step by step above.
Assumptions
- Exactly two naturally occurring isotopes.
- The average lies between the two isotope masses.