If an element has three isotopes with masses of 10.0 amu, 11...

Question Analysis
This question evaluates the student's ability to calculate the average atomic mass for an element with multiple isotopes.

Key Concept Explanation
The average atomic mass is the sum of the products of each isotope's mass and its fractional abundance.

Step-by-step Solution
1. Convert the natural abundances to fractional abundances: 25% = 0.25, 50% = 0.50, 25% = 0.25.
2. Use the formula:
3. Perform the calculations:

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