Intro to Nuclear Chemistry

The time taken for half of an amount of radioactive atoms to decay.

• Nuclear fusion
• Full-life
• Dead time
• Half-life

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NGSS.HS-PS1-8

Arrange in order of increasing ability to penetrate matter.

• Beta, gamma, alpha
• Alpha, gamma, beta
• Gamma, beta, alpha
• Alpha, beta, gamma

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NGSS.HS-PS1-8

What do these symbols represent?

• alpha particle
• beta particle
• neutron
• gamma ray

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NGSS.HS-PS1-8

How many neutrons are in this isotope of Uranium?

• 235
• 92
• 327
• 143

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NGSS.MS-PS1-1

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

• alpha particle
• beta particle
• gamma ray
• uranium

This is an example of...

• Fission  reaction
• Fusion reaction
• Decomposition reaction
• Combustion

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NGSS.HS-PS1-8

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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NGSS.HS-PS1-8

How is nuclear fusion different from nuclear fission?

• In fusion, the product is a larger atomic nucleus.
• Fission produces energy but fusion does not.
• Fusion produces energy but fission does not.
• In fission, the product is a larger atomic nucleus.

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NGSS.HS-PS1-8

This is an example of ---

• Radioactive Decay
• Nuclear Fission
• Nuclear Fusion
• Fossil fuel reaction

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NGSS.HS-PS1-8

What happens when the number of protons in an atom changes? 

• The number of electrons changes too 
• Usually nothing happens, unless the atom is radioactive 
• The atomic nucleus explodes
• It becomes a completely different atom, with different properties 

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NGSS.HS-PS1-8