Though Uranium-238 Is Radioactive, It Can Be Worked with Safely

question 37

Multiple Choice

Though uranium-238 is radioactive, it can be worked with safely in a glovebox with no additional precautions. This is because ________

• A)uranium-238 emits gamma rays and they are not absorbed very strongly by biological tissue.
• B)uranium-238 emits alpha particles which are weakly penetrating and do not reach beyond the glovebox.
• C)gamma rays and alpha particles emitted by the uranium-238 do not penetrate beyond the glovebox.
• D)the half-life of uranium-238 is so long that minimal radiation is emitted.
• E)the nitrogen atmosphere of the glovebox inhibits radioactive decay.

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Unemployment Rate

The percentage of the labor force that is jobless and actively looking for employment, a key economic indicator.

Estimated

Calculated approximations or predicted values based on statistical models and available data.

Teenagers

Individuals who are in the age group of 13 to 19 years.

Labor-Force Participation

The proportion of individuals within the working-age range who are currently employed or are seeking employment actively.