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

question 121

Multiple Choice

Bromine has two naturally occurring isotopes, Br-79 and Br-81. The mass of Br-79 is 78.92 u with a percent abundance of 50.69%. If the atomic mass of bromine is 79.904 u, calculate the mass and percent abundance of Br-81.

• A) 80.916 u and 50.69%
• B) 78.921 u and 49.31%
• C) 79.904 u and 49.31%
• D) 80.916 u and 49.31%
• E) 80.028 u and 50.31%

Knowledge of the biological origins and significance of specific terpenes and their effect on human pathogens.

Understand the structure and classification of natural products based on their isoprene units.

Familiarity with the basic structure of biologically significant compounds such as prostaglandins.

Ability to identify and circle isoprene units in complex organic molecules.