If We Start with 1

Question 25

Multiple Choice

If we start with 1.000 g of cobalt- 60, 0.675 g will remain after 3.00 yr. This means that the half- life of cobalt- 60 is _ _ yr.

A) 3.08
B) 7.65
C) 2.03
D) 5.30
E) 4.44

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