There are only two naturally-occuring stable isotopes of boron, the masses of which are listed in the table below. Use whatever data you need from the ALE Periodic Table to calculate the natural abundance of each isotope and complete the table. Be sure your answers have the correct number of significant digits. isotope 10 B 11B mass (amu) 10.013 11.009 natural abundance 19.9% 80.2% x10 X

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