Binding energy, fusion and fission Quiz
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5 questions, one answer each
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1. A nucleus has a mass deficit of 0.0250 u. What is this in kg?
- A. 4.15 × 10⁻²⁹ kg
- B. 4.15 × 10⁻²⁷ kg
- C. 1.51 × 10²⁵ kg
- D. 6.64 × 10⁻²⁶ kg
2. Which nucleus is found at the peak of the binding energy per nucleon curve?
- A. Hydrogen-2
- B. Helium-4
- C. Iron-56
- D. Uranium-235
3. Why does fission of uranium-235 release energy?
- A. The fragments have a lower binding energy per nucleon
- B. The fragments have a higher binding energy per nucleon
- C. Uranium has the highest binding energy per nucleon
- D. Neutrons carry away all the mass
4. Which statement about fusion is correct?
- A. It needs low temperature so nuclei can attract each other
- B. It releases energy for all nuclei heavier than iron
- C. It works best at low density
- D. It needs high temperature so nuclei can overcome electrostatic repulsion
5. The energy released when a mass deficit of 2.0 × 10⁻²⁹ kg is formed is closest to which value?
- A. 6.0 × 10⁻²¹ J
- B. 6.7 × 10⁻³⁸ J
- C. 1.8 × 10⁻¹² J
- D. 2.2 × 10⁻¹⁴ J