Multiple Choice
What does the term half-life describe?
A) time needed for half of the radioactive atoms in a substance to decay into stable isotopes.
B) time needed for half of the radioactive atoms in a substance to convert into energy.
C) half the time needed for a radioactive substance to become safe.
D) time needed for half the cells in an organism to turn cancerous from radiation damage.
E) half the time needed for cells in a living organism to recover from radiation damage.
Correct Answer:

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Correct Answer:
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