What Is the Half-Life of a Sample of Matter Containing

question 77

Multiple Choice

What is the half-life of a sample of matter containing a radioactive element?

• A) time needed for the radioactive atoms to build up half the energy needed to decay
• B) half the time needed for the radioactive decay rate to double
• C) time needed for half the radioactive atoms in the sample to decay
• D) half the time needed for all the radioactive atoms in the sample to decay

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Definitions:

Descriptive

Pertaining to the detailing or explanation of characteristics.

Experimental

Pertaining to a method of research in which variables are manipulated to observe their effects on other variables, typically within a controlled environment.

Anecdotal

Information based on personal accounts, observations, or stories, rather than systematic scientific evaluations.

Explanatory

Serving or intended to explain or make clear.