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

question 128

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) .Calculate the atomic weight of X.

• A)28.09 amu
• B)48.63 amu
• C)27.16 amu
• D)28.97 amu
• E)86.93 amu

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