[GT.02H]The table below shows the initial and final masses of a radioactive material in a container.
Initial mass (in kilograms) 0.8
Final mass (in kilograms) 0.05
Based on the table, which of these conclusions is correct?
The half life of the material is five years.
The half life of the material is four years.
The material has completed four half lives.
The material has completed five half lives.
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[GT.02H]The table below shows the initial and final masses of a radioactive material in a container....
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