10 minutes maximum! Can you do it in 5?

1.Which of the following answers best describes fusion and fission?

  
Fusion Fission
A
 The joining together of heavy nuclei The splitting of light nuclei
B
 The splitting of light nuclei The joining together of heavy nuclei
C
 The joining together of light nuclei The splitting of heavy nuclei
D
 The splitting of heavy nuclei The joining together of light nuclei

2. In the physics data book, the constant 'u' is given a value of 931.5 MeV c-2. This is a unit of...

  • A. energy.
  • B. momentum.
  • C. mass.
  • D. velocity.
3. Which of these statements gives the definition of 'binding energy'?
  • A. The energy required to completely separate the nucleons.
  • B. The energy required to split the nucleus in two.
  • C. The energy required to convert all of the mass present into energy.
  • D. The energy required to fuse two identical nuclei together.

4. Which of the following 4 metals has the highest binding energy per nucleon?

  • A. Aluminium
  • B. Lithium
  • C. Uranium
  • D. Iron

5. To calculate the energy released in fission and fusion, we use the formula:

ΔE = Δm c2

What does the letter 'c' represent in this formula?

  
  • A. Charge of nucleus
  • B. Specific heat capacity of the element
  • C. Speed of light
  • D. Binding energy

6. Complete the following sentence:

  
A carbon-12 nucleus has a(n) mass compared to the total mass of the separated individual nucleons.

7. Binding energy per nucleon varies with atomic mass and can be compared on a graph as shown below. Which of the graphs below gives the approximate shape of the best fit line of this graph?

  
Binding energy graph x4

8-10. These questions are about this element lithium. The symbol is shown here :

7 Li
3

lithium metal pieces
Pieces of Lithium metal from the Dennis s.k collection - Wikimedia

8. What are the values of N, Z and A for this stable isotope of lithium?

  • A. A = 4, N = 7, Z = 3.
  • B. A = 3, N = 7, Z = 4.
  • C. A = 7, N = 4, Z = 3.
  • D. A = 7, N = 3, Z = 4.

9. To the nearest whole number, the binding energy per nucleon of lithium-7 is 6 MeV.

What is the total mass defect of a lithium-7 nuclei using the value given above?

  • A. 24 MeV c-2
  • B. 18 MeV c-2
  • C. 42 MeV c-2
  • D. 6 MeV c-2

10. If two lithium-7 nuclei fuse together, they would produce an isotope of carbon called carbon-14. The binding energy per nucleon for carbon-14 is 8 MeV, to the nearest whole number.

Using the rounded (whole number) data given, what energy is released if two lithium-7 nuclei fused to produce a carbon-14 nucleus?
14 C
6
  • A. 28 MeV
  • B. 24 MeV
  • C. 42 MeV
  • D. 70 MeV