Question

Which of the following statements is/are correct?
1. A nucleus in an excited state may give up its excitation energy and return to the ground state by emission of electromagnetic $\gamma$-radiation.
2. $\gamma$-radiations are emitted as secondary effect of $\alpha$ and $\beta$-emission.
3. The nuclear isomers produced by $\gamma$-ray bombardment have the same atomic and mass number but differ in their lifetimes (whatever their ground state may be).
4. $X$-ray and $\gamma$-ray are both electromagnetic.

• A. 1 and 2
• B. 1, 2 and 3
• C. 2 and 3
• D. 1, 2, 3 and 4

Answer 1

The correct option is D 1, 2, 3 and 4

(1) A nucleus is an excited state may give up it as excitation

energy and return to ground state by emission of

electromagnetic wave $\gamma$ radiation or to lower energy

state.

(2) yes, $\gamma -$ radiations are emitted as energy effect of

$\alpha$ and $\beta$ emission

(3) yes, The statement is correct

(4) X-ray particles and Gamma ray particles both

travels with speed of light .

(Answer)$\to (1,2,3,4)$