The Average Atomic Mass of B Is 10

question 81

Multiple Choice

The average atomic mass of B is 10.80 u. Boron has only two stable forms (10.00 u) and (11.00 u) . What is the natural percent abundance of ?

• A) 80%
• B) 20%
• C) 1.0%
• D) 3.8%
• E) 75%

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Definitions:

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