Question

After $1 \alpha$ and $2 \beta$ emissions :

• A. mass number reduces by 1
• B. atomic number remains same
• C. mass number reduces by 2
• D. atomic number reduces by 4

Answer 1

Answer: (B)

$1 \alpha$ reduce the mass number by $4$ units and atomic number by $2$ units, while $1 \beta$ only increase the atomic number by $1$ unit.