Question

Which one of the following is unstable

• A. $\alpha$ ray
• B. $y-ray$
• C. proton
• D. neutron

Answer 1

The correct option is A $\alpha$ ray

$\alpha -ray$ is the sub atomic particles and their associated energy that are released during the decomposition of the unstable nuclei are referred to as radiation-

so that the correct option is A.