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Posted by on Friday, June 3, 2011 at 7:32pm.

What daughter isotopes are produced when a neutron combines with a nucleus of 235/92 U? Assume that three neutrons are also produced in the reaction.

A. 140/56 Ba, 95/36 Kr
B. 142/56 Ba, 93/36 Kr
C. 140/56 Ba, 93/36 Kr
D. 141/56 Ba, 94/36 Kr

Please help. Thanks.

  • Physics - , Saturday, June 4, 2011 at 2:10am

    With 3 neutrons produced, the sum of the atomic weights of the daughter product nuclei must be 235 + 1 - 3 = 233

    The atomic number (proton) sum for the daughter nuclei must be 92

    Only one of the four choices satisfines these criteria.

    Now you know how to make the choice.

  • Physics - , Saturday, June 4, 2011 at 10:54am

    Thank you for your help!

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