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Nuclei — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsNuclei1 Mark
MCQ
Which of the following is correct?
  • A
    There are 78 neutrons in 78​Pt192
  • B
    84​Po214 → 82​Pb210 + $\beta$
  • C
    92​U238 → 90​Th234 + 2​He4
  • D
    90​Th234 → 91​Pa234+ 2​He4
✓

Answer

  1. 92​U238 → 90​Th234 + 2​He4

Explanation:

After release of helium, there will be decrease in atomic number by 2 and mass number by 4.

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