2.15 Isotopic Composition

Some of the problems on this quiz require a periodic table. Atomic masses vary somewhat from one periodic table to another. To avoid confusion, use the following periodic table: Open up an extra tab and go to this website: http://www.ptable.com/

Also: to avoid rounding errors, keep all the work on the calculator and only round off at the very end to the specified number of sig figs.

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