Quiz: Radioactive Decay

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

Solve this equation for alpha decay.
₈₅²⁰⁹At = ___ + ₂⁴He

• ₈₃²⁰⁵Bi
• ₈₆²⁰⁹Rn
• ₈₁²⁰⁷Tl
• ₈₅²⁰⁸At

Balance the following equation:
¹⁴₆C --> ⁰_-1e + ________

• ¹⁴₅B
• ¹⁴₆C
• ¹⁴₇N
• ⁴₂He

Gamma rays have

• no mass

• a huge mass

• a small mass

• an average mass

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

In a correctly written symbol what would be located in the "A" position?

• number of neutrons
• atomic number
• number of electrons 
• mass number

Tags

Notation

In a correctly written symbol what would be located in the "Z" position?

• number of neutrons

• atomic number

• number of electrons

• mass number

Tags

Notation

Complete the nuclear equation and determine the type of decay that is occurring in this reaction. 

• alpha
• beta
• gamma
• none

Tags

Solve Alpha/Beta

Base your answer on the graph below. The graph shows the number of radioactive Isotope X atoms present as a sample of the isotope undergoes radioactive decay.

Based on the graph, the half-life of this radioactive isotope is

• 6 hours

• 9 hours

• 3 hours

• 12 hours

The graph shows the radioactive decay of rubidium-87.

What percentage of rubidium-87 atoms will be left after four half-lives?

• 25.0%

• 12.5%

• 6.25%

• 3.125%