Nuclear Structure – Online MCQs – Physics 10th

1. A radioactive decay can be represented as shown. ₈₈Ra²²⁶ → ₈₆Rn²²² + . . . . The emitted particle is a/an:

2. In the core of the sun hydrogen is being converted into helium. It takes ________ hydrogen atoms to fuse into each helium atom.

3. Radioactivity is:

4. A radioactive element emits a particle from the nucleus of one of its atoms. The particle comprises two protons and two neutrons. The name of this process is called:

5. A particle having the mass of an electron and the charge of a proton is called a:

6. In each nuclear fission, a few neutrons are emitted. These neutrons can trigger further nuclei to undergo self-sustained fission reaction that is known as:

7. Half-life of a radioactive element depends upon

8. They carry no electric charge.

9. It is the most dangerous of all other radioactive radiations.

10. A scientist experiments using a seated source that emits β-particles. The range of the β-particles in the air is about 30cm. The precaution that is the most effective to protect the scientist from radiation is:

11. The type of radiation that travels in a straight line across an electric field is a/an:

12. In alpha decay, the proton number or atomic number, Z of the parent nuclide reduces by _________ while its atomic mass or nucleon number, A, decreases by __________.

13. High penetrating power of gamma rays is due to their:

14. Various types of cancer are treated by:

15. The splitting of a heavy nucleus into smaller nuclei is called:

16. The decay for these emissions increases the number of neutrons.

17. For the diagnosis of brain tumors, the ___________ isotope is used.

18. Which one of these particles has the shortest penetrating ability?

19. Isotopes below the line of stability:

20. In the graph of unstable nuclei, stable isotopes lie: