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The half-life of uranium-235 is 700 million years. If you start with 10 atoms of it, how many will you have left after 700 million years? A)5 B)0 C)9 D)20
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The half-life of uranium-235 is 700 million years. If you start with 10 atoms of

it, how many will you have left after 700 million years?

A)5
B)0
C)9
D)20

User Samone
by
5.7k points

1 Answer

1 vote
A) 5

Half-life is the time it will take for a quantity to reduce to half its initial value. In this case, uranium will undergo radioactive decay, and after 700 mil years, 5 of the 10 uranium atoms will have decayed.
User AKKAweb
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