Strontium-90 Is Produced in Nuclear Fission Reactors

question 50

Multiple Choice

Strontium-90 is produced in nuclear fission reactors.If ingested it can replace calcium in the bones.The half-life of ⁹⁰Sr is 27.7 years.If the activity of ⁹⁰Sr in the bones of an exposed person were 90 disintegrations per second,how long would it take the activity of ⁹⁰Sr to decrease to 9.2 disintegrations per second?

• A) 91 years
• B) 67 years
• C) 46 years
• D) 54 years
• E) 78 years

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Definitions:

Accumulated Value

Refers to the total sum or aggregate of values collected over a period of time or through a series of operations, often used in financial, statistical, or operational contexts.

Delay Time

The time interval between the initiation of an action and its effect or response.

True To False Transition

The change of a logical signal or condition from a true (high, 1) state to a false (low, 0) state.