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Naturally Occurring Element X Exists in Three Isotopic Forms: X-28

Question 32

Multiple Choice

Naturally occurring element X exists in three isotopic forms: X-28 (27.979 u,77.03% abundance) ,X-29 (28.976 u,8.00% abundance) ,and X-30 (29.974 u,14.97% abundance) .Calculate the atomic weight of X.


A) 29.64 u
B) 28.36 u
C) 29.05 u
D) 29.60 u
E) 27.38 u

Correct Answer:

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