Nuclear Structure – Online MCQs – Physics 10th

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

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

3. The α-radiation is:

4. 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 __________.

5. 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:

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

7. During nuclear fusion of hydrogen into helium:

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

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

10. Isotopes below the line of stability:

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

12. The danger from these particles is minimal.

13. In γ ray emission from a nucleus:

14. γ-rays are deflected by:

15. When atoms lose or gain electrons, they become:

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

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

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

19. Isotopes above the stability line have:

20. To check thyroid function, a patient drinks a liquid containing radio: