Which ray contain positively charged particle
$\alpha -$ ray
$\beta -$ ray
$\gamma -$ ray
$X-$ ray
The composition of an $\alpha $- particle can be expressed as
A nucleus of an element $_{84}{X^{202}}$ emits an $\alpha-$ particle first, a $\beta-$ particle next and then a gamma photon. The final nucleus formed has an atomic number
In the disintegration series
$_{92}^{238}U\xrightarrow{\alpha }x\xrightarrow{\beta }_Z^AY$
The value of $Z$ and $A$ respectively will be
The $\beta$-particles of a radioactive metal originate from
During negative $\beta$-decay