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Zinc Has Five Naturally Occurring Isotopes with an Average Mass

Question 73

Multiple Choice

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)

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