If a radioactive nucleus decays according to the following reaction then the mass number and the atomic num ber of X4 then the mass number and the atomic number of X4 will be, respectively- (A) 172,70 (C) 172,68 (B) 172, 6'9 (D) 171, 69 (MP PET 2002)

Difficulty Level:

  • 10%
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  • 14%
  • 4%