The Average Atomic Mass of Zinc Is 65

question 1

Multiple Choice

The average atomic mass of zinc is 65.39 amu. Given the data in the following table, what is the natural abundance of ⁶⁶Zn? Isotope
Mass (amu)
Natural Abundance (%) ⁶⁴Zn
63) 9291
48) 89⁶⁶Zn
65) 9260
?⁶⁷Zn
66) 9271
4) 11⁶⁸Zn
67) 9249
18) 56⁷⁰Zn
69) 9253
0) 62

• A) 27.81%
• B) 0.2781%
• C) 50.00%
• D) 2.781%
• E) 28.71%

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