When a nucleus with atomic number Z and mass | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) In $\alpha$ decay,the nucleus emits an $\alpha$ particle $(^4_2He)$,so the atomic number $Z$ decreases by $2$ and the mass number $A$ decreases by

Vedclass · Accepted Answer

all of the above.

Vedclass · Answer

(D) In $\alpha$ decay,the nucleus emits an $\alpha$ particle $(^4_2He)$,so the atomic number $Z$ decreases by $2$ and the mass number $A$ decreases by $4$.In $\beta^+$ decay (positron emission),a proton converts into a neutron,so the atomic number $Z$ decreases by $1$ while the mass number $A$ remains unchanged.In $\gamma$ decay,the nucleus transitions from an excited state to a lower energy state by emitting a photon,so neither $Z$ nor $A$ changes.Since all the given statements are correct,the correct option is $D$.

When a nucleus with atomic number $Z$ and mass number $A$ undergoes a radioactive decay process:

Similar Questions

Choose the correct nuclear process from the below options $[p : \text{proton}, n : \text{neutron}, e^{-} : \text{electron}, e^{+} : \text{positron}, v : \text{neutrino}, \overline{v} : \text{antineutrino}]$.

$\gamma$-decay occurs when

In the nuclear reaction,${ }_6^{11} C \rightarrow{ }_5^{11} B + \beta^+ + X$,$X$ stands for

Outside a nucleus,which of the following statements is true?

The number of $\alpha$ and $\beta^-$ particles emitted during the radioactive decay chain starting from ${}_{88}^{226}Ra$ and ending at ${}_{82}^{206}Pb$ is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module