If You Begin with a Sample of 2

question 28

Multiple Choice

If you begin with a sample of 2.50 moles of a radioactive isotope and there are 2.05 * 10²¹ atoms left after one hour,what is the half-life of this isotope?

• A)9.1 minutes
• B)6.3 minutes
• C)13 minutes
• D)7.5 minutes

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Definitions:

Gambler's Fallacy

The erroneous belief that if something happens more frequently than normal during a given period, it will happen less frequently in the future, or vice versa.

Coin Flip

A method of making a decision or selecting between two options by tossing a coin and observing which side lands facing up.

Illusory Correlation

The mistaken perception of a relationship between two events or variables that are actually unrelated, often due to cognitive biases.

One-Shot Illusory Correlation

An illusory correlation that occurs after exposure to only one unusual behavior performed by only one member of an unfamiliar group.