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15 September, 07:58

What is the mass number of Ce

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Answers (2)
  1. 15 September, 10:46
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    The answer is 140.116 u + / - (plus or minus doesnt matter) 0.001
  2. 15 September, 11:34
    0
    140.116 u ± 0.001 u is the answer
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