The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining undecayed after 18 hr is
The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining undecayed after 18 hr is
A. 12 g
B. 16 g
C. 4 g
D. 8 g
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Correct Answer - c
`N""_("left")=(N""_(0))/(2""_(n))=256/2""^(6)=4g(T=t""_(1//2)xxn)`
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