nuclear energy

How do nuclear power-plants work?

• Fusion
• Half-life
• Fission
• Fusion or fission

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Takes two small nuclei and combines them into a larger nucleus

• fission
• fusion

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The splitting of a nucleus into smaller nuclei is

• fusion
• fission
• half-life
• gamma radiation

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Where does fusion occur naturally?

• Underwater
• All around us
• In the radioactive waste
• On the sun

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What is a half-life?

• The average time it takes for any element to disappear completely 
• The time it takes for a radioactive atom to lose half its neutrons
• The time it takes for half of any number of radioactive atoms to decay
• The time it takes for a radioactive atom to lose half its electrons 

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This is an example of...

• Fission  reaction
• Fusion reaction
• Decomposition reaction
• Combustion

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Splitting a uranium atom is called - 

• fission
• fusion

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All of the following are problems of nuclear energy except ---

• storage of radioactive fuel
• air pollution
• security concerns
• natural disasters (tsunamis, earthquakes, etc.)

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What is an advantage  of nuclear energy?

• radioactive waste
• no air pollution
• we will never run out
• it is the safest way to make energy

How do atoms with stable nuclei differ from atoms with unstable nuclei? Nuclei is the plural of nucleus.

• The number of particles in stable nuclei never changes; the number of particles in unstable nuclei does change 
• Stable nuclei contain equal numbers of protons and neutrons; unstable nuclei do not 
• Stable nuclei emit electrons; unstable nuclei emit protons and neutrons 
• Stable nuclei can be found everywhere; unstable nuclei do not occur in nature

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