$\alpha$ -particle consists of
$2$ protons and $2$ neutrons only
$2$ electrons, $2$ protons and $2$ neutrons
$2$ electrons and $4$ protons only
$2$ protons only
Which one of the following is a possible nuclear reaction
The radioactive nucleus $_7{N^{13}}$decays to $_6{C^{13}}$ through the emission of
A nuclear reaction is given by
${}_Z{X^A} \to {}_{Z + 1}{Y^A} + {}_{ - 1}{e^0} + \bar v$ , represents
Some radioactive nucleus may emit
What happens to the mass number and atomic number of an element when it emits $\gamma$-radiation?