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:

Russia

A country in Eastern Europe and North Asia, known for its significant history, culture, and vast geographical area.

Instinct

Instinct refers to an innate, biological tendency to perform a particular behavior pattern in response to specific environmental stimuli, without the need for learning or experience.

Identically

In exactly the same manner, form, or degree; having no differentiation.

Individual

Refers to a single human being as distinct from a group, community, or society.