Suppose That a Particular Sample of Wood Contains 10²⁰ Atoms

question 213

Multiple Choice

Suppose that a particular sample of wood contains 10²⁰ atoms of the radioactive isotope ¹⁴C. The half-life of ¹⁴C is about 6000 years. Approximately how long will it take for all the ¹⁴C atoms to decay to ¹⁴N?

• A) infinite amount of time
• B) 12,000 years
• C) 3000 years
• D) 6000 years

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Definitions:

Obsession

A persistent, intrusive, and unwanted thought or urge that causes significant anxiety or distress.

Repeatedly Checking

Compulsive behaviors characterized by the need to check things over and over, often associated with obsessive-compulsive disorder (OCD).

Agoraphobia

An anxiety disorder characterized by an intense fear of being in situations where escape might be difficult or help wouldn't be available if things go wrong.

Panic Attack

A sudden onset of intense fear or discomfort, characterized by symptoms such as rapid heartbeat, sweating, and feelings of doom.