MPSC PYQScience

When α-particle emits from a radioactive element then

A.atomic number decreases by 2 and mass number decreases by 4
B.atomic number decreases by 1 and mass number decreases by 2
C.atomic number increases by 1
D.atomic number and mass number remains same

Correct answer: A

Source paper

MPSC Gazetted CS Combined Pre 2023 (English)

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