An Element Has Three Naturally Occurring Isotopes with the Following

question 63

Multiple Choice

An element has three naturally occurring isotopes with the following masses and abundances (in parenthesis) : 27.977 amu (0.9222) ; 28.974 amu (0.0469) ; 29.974 amu (0.0310) . Calculate the atomic weight of the element.

• A) 28.09 amu
• B) 66.94 amu
• C) 86.93 amu
• D) 28.98 amu
• E) 83.93 amu

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