Some radioactive nucleus may emit
Only one $\alpha ,\;\beta $ or $\gamma $ at a time
All the three $\alpha ,\;\beta $ and $\gamma $ one after another
All the three $\alpha ,\;\beta $ and $\gamma $ simultaneously
Only $\alpha $ and $\beta $ simultaneously
Which ray contain positively charged particle
Explain the basic nuclear process by equation in $\beta -$ decay.
In which of the following decay, the element does not change
The $\beta$-particles of a radioactive metal originate from
In which radioactive disintegration, neutron dissociates into proton and electron