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Average Atomic Mass.

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Presentation on theme: "Average Atomic Mass."— Presentation transcript:

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
In a sample of silicon, 92.21% of the atoms have a mass of amu, 4.70% have a mass of amu and 3.09% have a mass of 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?

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