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Average Atomic Mass

Average Atomic Mass. AAM. Weighted average of all the known isotopes of an element In order to find the AAM you need the % and mass for each isotope. Find the average atomic mass of the following element: 234 U (0.01%), 235 U(0.71%), 238 U(99.28%).

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Average Atomic Mass

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  1. Average Atomic Mass

  2. AAM • Weighted average of all the known isotopes of an element • In order to find the AAM you need the % and mass for each isotope

  3. Find the average atomic mass of the following element: • 234U (0.01%), 235U(0.71%), 238U(99.28%)

  4. In a sample of silicon, 92.21% of the atoms have a mass of 27.98 amu, 4.70% have a mass of 28.98 amu and 3.09% have a mass of 29.97 amu. What is the average atomic mass of the sample?

  5. What is the average atomic mass of a sample of lead with the following composition? • 1.37% lead-204 • 26.26% lead-206 • 20.82% lead-207 • 51.55% lead-208

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