Q. The nucleus of atomic mass $A$ and atomic number $Z$ emits a $\beta$-particle. The atomic mass and atomic number of the resulting nucleus are
A) $A,Z$
B) $A + 1,\ Z$
C) $A,Z + 1$
D) $A - 4,\ Z - 2$
Explanation
(c) In $\beta$-decay, mass number is unaffected. Atomic number increase by one.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.