A 450 Mg Sample of a Newly Discovered Radioactive Nucleus Was

question 82

Multiple Choice

A 4.50 mg sample of a newly discovered radioactive nucleus was analyzed and found to contain only 3.25 mg after a period of 32.1 h.What is the half-life of the nucleus?

• A) 75.4 h
• B) 68.4 h
• C) 74.0 h
• D) 12.4 h
• E) 18.7 h

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Definitions:

Observations

Data collected or measured from a study or experiment on variables of interest.

Table Value

A specific value located in a statistical table that is used to determine the significance or critical values in hypothesis testing.

Correlation Coefficient

A numerical measure of some type of correlation, meaning a statistical relationship between two variables, indicating strength and direction of a linear relationship between them.

Scatterplot

A type of graph used in statistics to display values for two variables for a set of data, showing how much one variable is affected by another.