A Certain Radioactive Isotope Placed near a Geiger Counter Registers

question 59

Multiple Choice

A certain radioactive isotope placed near a Geiger counter registers 160 counts per second.Eight hours later,the counter registers 10 counts per second.What is the half-life of the isotope?

• A)8 hours
• B)6 hours
• C)4 hours
• D)2 hours
• E)none of these

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Definitions:

Evacuated collection tubes

Specialized tubes used in medical blood collection that are under vacuum to draw a predetermined volume of blood.

Phlebotomy

The practice of drawing blood from a vein, typically for laboratory testing or blood donation.

Morphology

The study of the shape or form of objects.

Coagulation

The process of blood changing from a liquid to a gel, forming a clot to stop bleeding.