Question

During a radioactive decay, which of the following statements is false

• A. atomic mass number cannot increase
• B. atomic number may increase
• C. atomic number may decrease
• D. atomic number will remain unchanged

Answer 1

The correct option is D atomic number will remain unchanged

D

In alpha decay the atomic number is decreased by 2. In beta decay atomic number is increased by 1 and in gamma decay atomic number remains unchanged. So in alpha and beta decay atomic number varies.