Question

As a result of radioactive disintegration the nucleus ${}_{92}{U}^{238}$ converts into ${}_{91}{Pa}^{234}$. The particles emitted during the process are

• A. $2\beta$ $particle$, $2p$
• B. $1\alpha$ $particle$, $1\beta$ $particle$
• C. $2\beta$ $particle$, $1n$ $\left(neutron\right)$
• D. $1p,2n$

Answer 1

The correct option is B $1\alpha$ $particle$, $1\beta$ $particle$

First alpha particle will be emitted which will change the mass number by $4$ and atomic number by $2$, and beta particle will increase the atomic number by $1$, without changing mass number.