Answers3262 CR Physics B 2526Unit Test — Unit testQuestion 24
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Unit Test — Unit test

Question 24 • 3262 CR Physics B 25/26

Calcium-51 has a half-life of 4.5 days. Only 0.75 gram remains of a sample that was initially 12 grams.How old is the sample of calcium-51?

Answer
A
4.5 days
B
9.0 days
C
13.5 days
D
18 days
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