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When a uranium isotope U 92 235 is bombarded with a neutron, it generates Kr 36 89 , three neutrons and:

Options

  1. AZr 40 91
  2. BKr 36 101
  3. CKr 36 103
  4. DBa 56 144

Correct answer

D. Ba 56 144

Step-by-step solution

Let mass number & atomic number of the unknown element be A & Z. A = 235 - 89 - ( 3 × 1 ) = 143 Z = 92 - 36 = 56 Hence, the element must be Barium. U 92 235 + 0 1 n → Kr 36 89 + Ba 56 144 + 3 0 1 n + Q

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