Question

An atom of mass number A and atomic number Z emits successively an $\alpha$-particle, a $\beta$-particle and a $\gamma$-ray. The mass number and atomic number of the end product are

• A. A -1, Z -4
• B. A , Z +1
• C. A -4, Z+2
• D. A -4, Z-1

Answer 1

Answer: (D)

A -4, Z-1

Answer 2

(A - 4), ( Z - l )