1. Radioactivity is defined as the emission of:

2. The SI unit of radioactivity is:

3. One becquerel (Bq) is equal to:

4. Who discovered radioactivity in 1896?

5. Radioactive properties were first discovered in:

6. Who discovered polonium and radium in 1898?

7. Important minerals used for nuclear energy generation are:

8. Which of the following is a radioactive element?

9. Uranium has how many important isotopes?

10. The important isotopes of uranium are:

11. Which uranium isotope is commonly used in nuclear power plants?

12. Heavy water is chemically known as:

13. Heavy water is used in nuclear reactors as

14. The three main types of radioactive rays are the following:

15. Who demonstrated alpha and beta radiation in 1899?

16. Alpha particles consist of:

17. Alpha particles are doubly charged ions of:

18. Beta particles are

19. Conversion of a proton into a neutron is known as:

20. Conversion of a neutron into a proton is known as: