If 92 U 235, decays by emitting two α one β and two γ -rays the new daughter element is = _.
Correct answer: B. 89 Y 227
- A. 88 Y 227
- B. 89 Y 227
- C. 90 Y 227
- D. 89 Y 231
Explanation
⁹²U²³⁵ -- ⁹⁰V²³¹ ( + ²He⁴ ) -- ⁸⁸W²²⁷ (+ ²He⁴) -- ⁸⁹Y²²⁷ (+1Beta particle. By default it would be considered Beta-ve and hence 1 neutron (n) converts to 1 proton(p), increasing atomic number to 89 , and 1 electron emitted. The mass number remains unchanged as it is equal to neutrons + protons and 1 n has been converted to 1 p)Gamma rays have no mass or charge so have no effect on nucleons. Thus, answer: ⁸⁹Y²²⁷
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