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

Question 6

Multiple Choice

Naturally occurring element X exists in three isotopic forms: X-28 (27.977 amu,92.23% abundance) ,X-29 (28.976 amu,4.67% abundance) ,and X-30 (29.974 amu,3.10% abundance) .What is the identity of element X?


A) Cu
B) Al
C) Ni
D) Si
E) Sr

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