Questions
A radioactive substance has a half life of four months. Three fourth of the substance will decay in
a
Three
b
Four months
c
Eight months
d
Twelve months.
detailed solution
Correct option is C
Substance left undecayed=N0−34N0=14N0 NN0=14=(12)n ∴n=2i.e. In two half lives. ∴t=nT=2×4=8 monthsTalk to our academic expert!
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