1.

The number of neutrons emitted when._(92)^(235)U undergoes controlled nuclear fission to ._(54)^(142)Xe and ._(38)^(90)Sr is

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SOLUTION :`._(92)U^(235) rarr ._(54)Xe^(142) + ._(38)Sr^(90) + 3 ._(0)N^(1)`


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