The Model Describes the Amount of Cesium-137 Remaining After

question 64

Multiple Choice

The model describes the amount of Cesium-137 remaining after t years. Which one of the following written statements best describes the behavior of Cesium-137?

• A) The amount of radioactive substance decreases by half every years.
• B) The amount of radioactive substance increases by half every year.
• C) The amount of radioactive substance increases by half every years.
• D) The amount of radioactive substance decreases by half every 79 years.
• E) The amount of radioactive substance decreases by half every year.

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