1.

80% of the radioactive nuclei present in a sample is found to remain undecayed after one day. The percentage of undecayed nuclei left after two days will beA. 64B. 20C. 46D. 80

Answer» Correct Answer - a
`lambda = (2.303)/(t) log ((N_(0))/(N))`
`= (2.303)/(1) log ((100)/(80))`
`lambda = (2.303)/(2) log ((100)/(N))`
`(2.303)/(1) log ((100)/(80)) = (2.303)/(2) log ((100)/(N))`
`((5)/(4))^(2) = (100)/(N)`
`N = 64`


Discussion

No Comment Found

Related InterviewSolutions