supergirl13 supergirl13
  • 24-09-2016
  • Chemistry
contestada

what is the mass number of Ce

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Anslee
Anslee Anslee
  • 24-09-2016
140.116 u ± 0.001 u is the answer
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josiah168
josiah168 josiah168
  • 24-09-2016
 The answer is 140.116 u +/- (plus or minus doesnt matter) 0.001
Answer Link

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