An Archaeologist Finds the ¹⁴C in a Sample of

question 21

Multiple Choice

An archaeologist finds the ¹⁴C in a sample of of material to be decaying at 107 counts per second. A modern 1.00-g sample of the same material decays at 151 counts per second. The half-life of ¹⁴C is 5730 y. How old is the sample?

• A) 12,200 y
• B) 8460 y
• C) 25,100 y
• D) 12,600 y

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Definitions:

Bilateral Electroconvulsive Therapy

A form of electroconvulsive therapy in which electric currents are passed through the brain bilaterally (through both hemispheres) to induce a brief seizure, with the purpose of treating severe mental illnesses.

Electrical Current

The flow of electric charge, typically measured in amperes, through a conductor or medium.

Electroconvulsive Therapy (ECT)

A medical treatment most commonly used for severe major depression which involves brief electrical stimulation of the brain while the patient is under anesthesia.

Psychotic Patients

Individuals diagnosed with psychotic disorders, experiencing symptoms like hallucinations and delusions, affecting their perception of reality.