Nuclear Chemistry Test

The time required for half of a sample of a radioactive substance to undergo nuclear decay is called __________.

• Decay Time
• Half Life
• Atoms don't decay
• Isotope time

Which type of radiation is most penetrating?

• Gamma
• They are equal
• Beta
• Alpha

Which produces more energy--nuclear fission or nuclear fusion?

• Fusion
• Fission
• They produce the same amount
• It depends on the elements used

When one large nucleus is split into two smaller nuclei, the process is nuclear _____.

• Fusion
• Fission
• Tracing
• Decay

Two or more nuclei combine to form one larger nucleus in the process of nuclear _____.

• Fusion
• Fission
• Tracing
• Decay

Beta particles have a _____ charge

• +1
• 0
• -1
• +2

What is the symbol for an alpha particle?

• ⁴₂He
• ⁰_-1e
• ⁰₊₁ e
• ¹₀n

Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.

• Alpha
• Beta
• Gamma

Has the lowest penetrating power.  Can only penetrate 0.05 mm into the body and can be stopped by a piece of paper or clothing.

• Alpha
• Beta
• Gamma

Gamma rays have a _____ charge

• 0
• +1
• -1
• +2