21. Nuclear Chemistry
Rate of Radioactive Decay
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ANSWERS OPTIONS
A
4.52 × 102 disintegrations/day
B
8.19 × 10–1 disintegrations/day
C
6.34 × 104 disintegrations/day
D
7.22 × 10–3 disintegrations/day
Calcium is an essential mineral required by the body. One isotope of calcium, 48Ca (abundance = 0.187%), is radioactive with a half-life of 6.4 × 1019 y. Calculate the rate constant for 48Ca and the number of disintegrations per day in 1.50 metric ton CaCl2.