Nuclear Structure – Online MCQs – Physics 10th

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

2. A radioactive decay can be represented as shown. ₉₁Pa²³³ → ₉₂U²³³ + . . . . The emitted particle is Wan

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

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

5. The main source of energy in the stars is:

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

7. A radioactive nuclide emits a β-particle. The atomic number (proton number) of the nucleus:

8. The number of neutrons in the uranium nucleus will be:

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

10. α-particles has a charge of:

11. Radioactivity is:

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

13. Various types of cancer are treated by:

14. β particles have:

15. 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:

16. In the core of the sun hydrogen is being converted into helium. This is called:

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

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

19. If the radioactive source is placed inside the electric field, this radiation does not change its direction.

20. β particles are ____________ than / to a particles.