Which one of the following statements about nuclear energy is true?
- It gives less energy than chemical energy.
- It gives the same amount of energy as chemical energy.
- It gives more energy than chemical energy.
- It gives no energy at all.
Uranium-235 is described as a:
- nitrile nucleus
- fissile nucleus
- fusile nucleus
- tensile nucleus
Which one of the following particles is most likely to cause fission?
- Neutron
- Alpha Particle
- Beta Particle
- Ion
Under which one of the following circumstances is fission most likely to occur?
- When the nucleus decays radioactively, emitting an alpha particle
- When the nucleus decays radioactively, emitting an beta particle.
- When the nucleus is exposed to a gamma ray.
- When a neutron is incorporated into the nucleus.
Fission occurs when:
- a slow neutron is incorporated into a fissile nucleus
- a fast neutron passes through a fissile nucleus.
- a very slow neutron bounces off a fissile nucleus.
- when a fissile nucleus decays radioactively.
When two small nuclei come together, this is called:
- fission
- fussion
- fusion
- fashion
Which one of these descriptions is true of a deuterium atom?
- It is a hydrogen nucleus consisting of one proton.
- It is a hydrogen atom consisting of one proton and one electron.
- It is a hydrogen atom consisting of one proton, one neutron and one electron.
- It is a hydrogen atom consisting of one proton, one neutron and two electrons.
Which one of these best describes fusion.
- Two hydrogen atoms come together to form a diatomic molecule of hydrogen.
- A deuterium atom and tritium atom come together to form a diatomic molecule of "heavy" hydrogen.
- Two hydrogen nuclei come together to form an isotope of helium that has no neutrons.
- A deuterium nucleus and tritium nucleus come together to form a helium nucleus.
Why is nuclear fusion difficult to achieve?
- The reactants are very unreactive.
- Very high temperatures are needed.
- Very strong acids are needed.
- Fusion only occurs in the presence of special catalysts.
Where are fusion processes found?
- In the cylinder of a petrol engine.
- In a reactor.
- In a star
- In a furnace