Nuclear Structure – Online MCQs – Physics 10th

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

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

3. β particles have:

4. Ions are:

5. Compared with α-particles and β-particles, γ-rays:

6. A nuclear reaction is given by:

7. In radiosurgery, a strong gamma emitter __________ is used.

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

9. 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:

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

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

12. ₁H² + ₁H³ → ₂He⁴ + ₀n¹ + energy. This reaction is an example of:

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

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

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

16. The severe health hazards caused by radioactive emissions is/are:

17. 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 __________.

18. A powder contains 100mg of a radioactive material that emits α-particles. The half-life of the isotope is five days. The mass of isotope that remains after ten days will be:

19. The radio active source is placed inside the electric field, α-particles are deflected towards a:

20. The heaviest isotopes (proton number, Z > 83) decay by _________ emissions.