The half-life of ¹³¹I is 0.220 years.How much of a 500.0 mg sample remains after 24 hours?

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To calculate the remaining amount of a substance after a certain period, given its half-life, we use the formula: remaining amount = initial amount * (1/2)^(time elapsed/half-life). For ¹³¹I with a half-life of 0.220 years, and wanting to know the amount remaining after 24 hours (which is 24/24/365 = 1/365 years), we calculate: 500.0 mg * (1/2)^(1/365/0.220) ≈ 496 mg.

The Half-Life of 131I Is 0

The Half-Life of ¹³¹I Is 0