The Element X Has Three Naturally Occurring Isotopes

question 139

Multiple Choice

The element X has three naturally occurring isotopes.The masses (amu) and % abundances of the isotopes are given in the table below.The average atomic mass of the element is ________ amu.

• A)33.333
• B)220.40
• C)220.24
• D)219.00
• E)219.67

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