Alpha `(alpha)` particles are

The alpha particles are

The alpha particles are

Rutherford's alpha( alpha ) particles scattering experiment resulted into discovery of

Rutherford's alpha( alpha ) particles scattering experiment resulted into discovery of

An alpha particle is

An alpha particle is

The alpha -particle are

Element ._(z)M^(A) emits one alpha (alpha) particle followed by two beta ( beta) particles. Among the following the daughter element is