11
practice testMultiple Choice

Practice Test

Question 11 • Physical Science

Which describes radioactive decay of a substance?

Answer
A
Isotopes are the least stable during the later half-lives.
B
Isotopes are the most stable during the first half-life.
C
More of the radioactivity is lost during the first half-life than in later half-lives.
D
More of the radioactivity is lost during the fourth half-life than in the first half-life.
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