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 The weighted average of its naturally occurring isotopes. Chemical Name Atomic # Chemical Symbol Atomic Mass (Average Atomic Mass)

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Presentation on theme: " The weighted average of its naturally occurring isotopes. Chemical Name Atomic # Chemical Symbol Atomic Mass (Average Atomic Mass)"— Presentation transcript:

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2  The weighted average of its naturally occurring isotopes. Chemical Name Atomic # Chemical Symbol Atomic Mass (Average Atomic Mass)

3  Multiply the mass of each isotope by its abundance to get the weighted average.

4  Boron is 80.20% boron-11 (atomic mass 11.01 amu) and 19.80% boron-10 (atomic mass 10.01 amu). What is the average atomic mass of boron?

5  Neon has 2 isotopes.  Neon-20 has a mass of 19.992 amu.  Neon-22 has a mass of 21.991 amu.  In an average sample of neon atoms, 90% will be neon-20 and 10% will be neon-22. Calculate the average atomic mass.

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