Bromine Has Two Naturally Occurring Isotopes, Br-79 and Br-81

question 109

Multiple Choice

Bromine has two naturally occurring isotopes, Br-79 and Br-81. The atomic mass of Br-79 is 78.9183 u with a percent abundance of 50.69% and the atomic mass of Br-81 is 80.9163 u. Calculate the atomic mass of bromine.

• A) 80.91 u
• B) 78.92 u
• C) 79.90 u
• D) 80.92 u
• E) 80.03 u

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