About How Many Days Are Required for a Radioactive Sample,with

question 11

Multiple Choice

About how many days are required for a radioactive sample,with an initial activity of 10⁵ Bq,to decay to an activity of 100 Bq? The half-life of the material is 4.5 days.

• A)about 45 days
• B)about 36 days
• C)about 54 days
• D)about 31 days

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Definitions:

Total cholesterol

The sum of all the cholesterol types in the bloodstream, including HDL, LDL, and VLDL.

Blood test

A clinical analysis performed on a blood sample to evaluate general state of health or detect illnesses.

Fasting glucose

The level of glucose, or sugar, in the blood after a person has not eaten for a specified period, typically used for diabetic screening or monitoring.

Hematocrit determination

A laboratory test that measures the proportion of red blood cells in blood volume to assess an individual's blood composition.