The Isotope Has a Half-Life of 21 Hours

question 4

Multiple Choice

The isotope has a half-life of 21 hours. If a sample initially contains exactly 10,000 atoms of , approximately how many of these atoms will remain after one week?

• A) 1250
• B) 78
• C) 39
• D) 0
• E) None of these choices is correct.

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Definitions:

Amphetamines

A class of stimulant drugs that increase activity within the brain and nervous system and are used therapeutically for conditions like ADHD and narcolepsy.

Barbiturates

A class of drugs that act as central nervous system depressants, used to treat anxiety, insomnia, and seizure disorders but can be addictive and dangerous.

Effects

The outcomes or consequences triggered by specific causes or actions, often studied to understand the impact of one variable on another.

Alcohol

A psychoactive substance found in drinks such as beer, wine, and spirits, that can alter mood and behavior.