Q9
1 g of 90Sr gets converted to 0.953 g after 2 yr. The half-life of 90Sr, and the amount of 90Sr remaining after 5 yr are
A.
1.44 yr and 0.916 g
B.
57.6 yr and 0.75 g
C.
28.8 yr and 0.887 g
AnswerD.
100 yr and 0.982 g
Answer: Option C
Solution
Answer: Option C
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