Question
Question: The half-life of \(215 ⥂ At\) is\(100\mu s\). The time taken for the radioactivity of a sample of \(...
The half-life of 215⥂At is100μs. The time taken for the radioactivity of a sample of 215⥂At to decay to 1/16th of its initial value is.
A
400μs
B
6.3μs
C
40μs
D
300μs
Answer
400μs
Explanation
Solution
The radioactivity of a sample decays to 161thof its initial value in four half lives.