A radioisotope ₄₁Ar initially decays at the rate of 34,500 disintegrations/minute, but decay rate falls to… · ABC26PH0897
Subject: Physical Chemistry · Chapter: Chemical Kinetics · Topic: Chemical Kinetics – General · Exam: CSIR NET JUNE 2013 · Marks: 2 · Difficulty: Medium
A radioisotope ${}_{41}\mathrm{Ar}$ initially decays at the rate of 34,500 disintegrations/minute, but decay rate falls to 21,500 disintegrations/minute after 75 minutes. The $t_{1/2}$ for ${}^{41}\mathrm{Ar}$ is:
(a)90 minutes
(b)110 minutes
(c)180 minutes
(d)220 minutes
Answer
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