The Half-Life of Technetium-99m Is 6 Hours

question 60

Multiple Choice

The half-life of technetium-99m is 6 hours. How many unstable atoms will remain after 12 hours?

• A) One sixth of the original amount.
• B) One fourth of the original amount.
• C) One third of the original amount.
• D) Half of the original amount.

Convert numbers between fraction, percentage, and decimal formats.

Understand and apply the concept of unit pricing.

Perform and understand the implications of rounding numbers.

Compare numerical values to determine which is greater or smaller.

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Definitions:

System of Equations

A set of two or more equations with the same set of unknowns, which are solved simultaneously.

Variable Substitution

Replacing a variable in an equation or expression with its corresponding value.

Variable Substitution

Replacing variables with specific values or expressions within mathematical equations to simplify or solve them.

Exponentiation

A mathematical operation involving two numbers, where one number, the base, is raised to the power of the other, the exponent.