The Half-Life of ³⁰P Is 2

question 48

Multiple Choice

The half-life of ³⁰P is 2.50 minutes. If a sample of ³⁰P has 1.60 × 10¹⁰ nuclei present initially, how many remain after 10.0 minutes?

• A) 0.800 × 10¹⁰
• B) 0.400 × 10¹⁰
• C) 0.200 × 10¹⁰
• D) 0.100 × 10¹⁰
• E) 0.050 × 10¹⁰

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Definitions:

Chi-Squared Distribution

A probability distribution that arises in statistics when a normal distribution is squared, commonly used in significance testing.

Degrees of Freedom

The count of distinct values or measures that can be allocated to a statistical distribution while adhering to all restrictions.

Chi-Squared Distribution

A probability distribution that is commonly used in hypothesis testing and models the distribution of sum of squares of independent standard normal random variables.

Chi-Square Distribution

A probability distribution that is used in statistical significance tests, especially for categorical data.