Q1: 1. What is the charge of a proton?

• A) +1
• B) 0
• C) -1
• D) +2

Q2: 2. Which particle has the least mass among the following?

• A) Alpha particle
• B) Beta particle
• C) Neutron
• D) Proton

Q3: 3. What is the charge of a neutron?

• A) +1
• B) 0
• C) -1
• D) +2

Q4: 4. Which force is responsible for binding protons and neutrons in a nucleus?

• A) Electromagnetic force
• B) Gravitational force
• C) Strong nuclear force
• D) Weak nuclear force

Q5: 5. What is the approximate diameter of a typical atomic nucleus?

• A) 10^-10 m
• B) 10^-14 m
• C) 10^-18 m
• D) 10^-22 m

Q6: 6. Which of the following is not a type of radioactive decay?

• A) Alpha decay
• B) Beta decay
• C) Gamma decay
• D) Positron decay

Q7: 7. What is the charge of an alpha particle?

• A) +1
• B) 0
• C) -1
• D) +2

Q8: 8. Which of the following is not a nucleon?

• A) Proton
• B) Neutron
• C) Electron
• D) Alpha particle

Q9: 9. Which of the following particles has the highest penetration power?

• A) Alpha particle
• B) Beta particle
• C) Gamma ray
• D) Neutron

Q10: 10. What is the mass number of an atom with 6 protons and 8 neutrons?

• A) 6
• B) 8
• C) 14
• D) 2

Q11: 11. Which type of radioactive decay involves the emission of a high-energy electron?

• A) Alpha decay
• B) Beta decay
• C) Gamma decay
• D) Positron decay

Q12: 12. What is the charge of a positron?

• A) +1
• B) 0
• C) -1
• D) +2

Q13: 13. The nucleus of an atom contains

• A) Electrons and protons
• B) Electrons and neutrons
• C) Protons and neutrons
• D) Protons and positrons

Q14: 14. Which type of radiation has the least ionizing power?

• A) Alpha particles
• B) Beta particles
• C) Gamma rays
• D) Neutrons

Q15: 15. What is the energy source that powers the sun?

• A) Nuclear fission
• B) Nuclear fusion
• C) Alpha decay
• D) Beta decay

Q16: 16. The half-life of a radioactive element is the time taken for

• A) Half of the atoms to decay
• B) All atoms to decay
• C) One-fourth of the atoms to decay
• D) None of the atoms to decay

Q17: 17. Which particle is the lightest among the following?

• A) Proton
• B) Neutron
• C) Electron
• D) Positron

Q18: 18. What is the process by which a heavy nucleus splits into lighter nuclei?

• A) Nuclear fusion
• B) Electron capture
• C) Nuclear fission
• D) Radioactive decay

Q19: 19. Which type of radiation can be stopped by a sheet of paper?

• A) Alpha particles
• B) Beta particles
• C) Gamma rays
• D) Neutrons

Q20: 20. The atomic number of an element is determined by the number of

• A) Protons
• B) Neutrons
• C) Electrons
• D) Nucleons

Q21: 21. What is the primary cause of the energy released in a nuclear reaction?

• A) Mass defect
• B) Electron capture
• C) Radioactive decay
• D) Alpha decay

Q22: 22. Which particle has a positive charge equivalent to that of an electron?

• A) Alpha particle
• B) Beta particle
• C) Positron
• D) Neutron

Q23: 23. The process of a neutron turning into a proton with the emission of an electron is known as

• A) Alpha decay
• B) Beta decay
• C) Gamma decay
• D) Electron capture

Q24: 24. What is the most common isotope of hydrogen?

• A) Hydrogen-1
• B) Hydrogen-2
• C) Hydrogen-3
• D) Hydrogen-4

Q25: 25. Which type of radiation has the highest energy?

• A) Alpha particles
• B) Beta particles
• C) Gamma rays
• D) Neutrons