- The Element Boron B Has Two Naturally Occurring Isotopes Isotope Approximate Isotope Mass Amu Natural Abundance 1 (40.97 KiB) Viewed 44 times
The element boron, B, has two naturally occurring isotopes: Isotope Approximate* Isotope Mass (amu) Natural Abundance (%
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The element boron, B, has two naturally occurring isotopes: Isotope Approximate* Isotope Mass (amu) Natural Abundance (%
The element boron, B, has two naturally occurring isotopes: Isotope Approximate* Isotope Mass (amu) Natural Abundance (%) boron-10 10.0 19.6 boron-11 11.0 80.4 *Isotope masses have been determined to several decimal places (for example, the mass of 10B is more precisely reported as 10.01293695 amu!). For this quiz, use the truncated (3 sig fig) masses given above. Calculate the average atomic mass of boron, and report your answer with appropriate significant figures and units.