Cerium Has Four Stable Isotopes Listed Below

question 152

Multiple Choice

Cerium has four stable isotopes listed below. If the weighted average atomic mass of cerium is 140.116 amu, calculate the atomic mass of cerium-142.
Ce-136 135.90714 amu 0.19%
Ce-138 137.90599 amu 0.25%
Ce-140 139.90543 amu 88.43%
Ce-142 11.13%

• A)141.911 amu
• B)142.341 amu
• C)142.000 amu
• D)141.556 amu
• E)142.911 amu

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