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Nuclear Fusion

Q1. The fusion of two deuterium nuclei produces a nuclide of helium plus a neutron and liberates 3.27 MeV of energy. How does the mass of the two deuterium nuclei compare with the combined mass of the helium nucleus and neutron?

A
 It is 5.8 × 10-30 kg greater before fusion.
B
 It is 5.8 × 10-30 kg greater after fusion.
C
 It is 5.8 × 10-36 kg greater before fusion.
D
 It is 5.8 × 10-36 kg greater after fusion.

 

Q2. In the reaction shown, a proton and a deuterium nucleus, H, fuse together to form a helium nucleus,

What is the value of Q, the energy released in this reaction?

mass of a proton = 1.00728 u

mass of a H nucleus = 2.01355 u

mass of a He nucleus = 3.01493 u

A
 5.0 MeV
B
 5.5 MeV
C
 6.0 MeV
D
 6.5 MeV

 

 

Q3. The reaction shown below occurs when a proton and a deuterium nucleus, H, fuse to form a helium nucleus.

If the energy released, Q, is 5.49 MeV, what is the mass of the helium nucleus?

mass of H nucleus = 2.01355 u

mass of proton = 1.00728 u

A
 0.00589 u
B
 3.01494 u
C
 3.02083 u
D
 3.02323 u

 

Q4. A deuterium nucleus and a tritium nucleus fuse together to form a helium nucleus, releasing a particle X in the process, according to the equation

Which one of the following correctly identifies X?

A
 electron
B
 neutron
C
 positron
D
 proton