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Iodine-131 decays by beta emission with a half-life of 8.04 days. What is the decay constant for iodine-131?
a. 5.18 × 10⁻³/h
b. 5.99 × 10⁻⁵/min
c. 1.44 × 10⁻⁶/s
d. 1.24 × 10⁻¹/day
e. 3.35 × 10⁻¹/h


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