# 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