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Modern Physics — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsModern Physics1 Mark
MCQ
During $\alpha$-emission :
  • A
    the mass number and atomic number of an atom decrease by 2 amu .
  • ✓
    the mass number decreases by 4 amu and atomic number decreases by 2 amu .
  • C
    the mass number remains unchanged, but atomic number decreases by 2 amu.
  • D
    the mass number decreases by 4 amu and atomic number remains unchanged.
✓

Answer

Correct option: B.
the mass number decreases by 4 amu and atomic number decreases by 2 amu .
B

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