Zinc has five naturally occurring isotopes with an average mass of 65.39 amu. Three isotopes, in roughly equal amounts, account for 95% of zinc. Which isotope is most abundant?
A) (64Zn, 63.9291 amu)
B) (66Zn, 65.9260 amu)
C) (67Zn, 66.9271 amu)
D) (68Zn, 67.9249 amu)
E) (70Zn, 69.9253 amu)
Correct Answer:
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