The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains after 6.55 years?

Question

Quizplus · Accepted Answer

The decay of a radioactive substance can be calculated using the formula: N(t) = N0 * (1/2)^(t/T), where N0 is the initial quantity, t is the time elapsed, and T is the half-life. For cobalt-60, N0 = 2.000 mg, t = 6.55 years, and T = 5.20 years. Plugging these values into the formula gives N(6.55) = 2.000 * (1/2)^(6.55/5.20) = 0.837 mg.

The Half-Life of Cobalt-60 Is 5