ATOMIC NUCLEUS MCQs 8 min Score: 0 Attempted: 0/8 Subscribe 1. . Proton and electron have charges: (A) Same (B) Opposite (C) No charge (D) Double positiveShow All Answers 2. . When α-emission takes place, the number of protons: (A) Increases by two (B) Decreases by two (C) Increases by four (D) Decreases by fourShow All Answers 3. . When β-emission takes place, the atomic mass: (A) Increases by two (B) Decreases by two (C) Increases by four (D) Decreases by fourShow All Answers 4. . Mass of a proton is: (A) 1.67 × 10⁻²⁷ kg (B) 1.67 × 10⁻³¹ kg (C) 9.10 × 10⁻³¹ kg (D) 1.67 × 10⁻¹⁷ kgShow All Answers 5. . Atomic number is equal to: (A) Number of protons (B) Number of neutrons (C) Number of protons and neutrons (D) All of theseShow All Answers 6. . Elements showing radioactivity have atomic number: (A) Z > 72 (B) Z > 83 (C) Z < 72 (D) Z < 83Show All Answers 7. . Mass number is equal to: (A) Number of protons (B) Number of neutrons (C) Number of protons and neutrons (D) All of theseShow All Answers 8. . Gamma rays consist of a stream of: (A) Electrons (B) Protons (C) Positrons (D) PhotonsShow All Answers
