Nuclear Reactions

What is the best description of what occurs in a fission reaction?

• energy is absorbed, & more stable elements are formed
• light nuclei form into heavier nuclei
• energy is released, and less stable elements are formed
• heavy nuclei split into lighter nuclei

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NGSS.HS-PS1-8

Four types of reactions are performed, each using the amount of reactants. Which reaction released the greatest amount of energy?

• fission reaction
• endothermic reaction
• fusion reaction
• exothermic reaction

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NGSS.HS-PS1-8

What change takes place in a nuclear fusion reaction?

• matter is converted to energy
• energy is converted to matter
• ionic bonds are converted to covalent bonds
• Covalent bonds are converted to ionic bonds

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NGSS.HS-PS1-8

The biggest disadvantage of using nuclear power to produce electricity is?

• Nuclear fission releases more air pollution than burning coal
• Nuclear waste must be safely stored for many years
• Nuclear fission produces less energy than burning coal or oil
• Nuclear waste must be incinerated

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NGSS.HS-ETS1-3

What is an advantage of nuclear-fission reactor?

• A large amount of energy can be produced from a small amount of uranium.
• The power plants are only expensive if they require radiation shielding.
• The nuclear waste generated has a very long half-life.
• The products of fission reactions are often radioactive isotopes.

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NGSS.HS-PS1-8

What is the difference between fission and fusion?

• Fission combines small nuclei, while fusion combines large nuclei.
• Fission combines large nuclei, while fusion combines small nuclei.
• Fission splits large nuclei, while fusion combines small nuclei.
• Fission splits large nuclei, while fusion combines large nuclei.

Tags

NGSS.HS-PS1-8

Nuclear fission occurs when:

• a nucleus divides spontaneously, with no apparent reason
• electrical forces inside a nucleus overpower nuclear forces
• we cut nuclei in two with a very small cutting device
• one nucleus bumps into another causing a chain reaction

Tags

NGSS.HS-PS1-8

What makes something radioactive?

• elements with an atomic number above 81
• an unstable nucleus
• contaminated sewage
• It decays over time

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NGSS.HS-PS1-8

Alpha particles have...

• positive charged
• negative charged
• no charge
• radioactive charge

Tags

NGSS.HS-PS1-8

A helium nucleus with two protons and two neutrons is called a(n) ____ particle

• alpha
• beta
• gamma
• lambda