The beta particles of a radioactive metal originate from -

Emission of beta -particles from a radioactive species produces its :

beta- particle in radioactivity is emitted by:

beta -particle is emitted in radioactivity by

For the atom produced by beta - particle emission form a radioactive atom

If an alpha -particle and two beta -particles are emitted from from a radioactive element, the element produced becomes an ____of the parent element.

A beta -particle is emitted by a radioactive nucleus at the time of conversion of