Question

7. A sample contains 9,000 particles of the original isotope for every 63,000 particles of the daughter

isotope. The half-life of the original isotope is 19 years. Find the age of the sample.

Answer 1

Step-by-step explanation:

Half life= 19yrs

K= 0.693/19yr

K= 0.036

In Nt = - kt + ln No

ln 9000 = - 0.036(t) + ln 63000

9.105 = - 0.036t + 11.051

-0.036t = -1.946

t = 54.06years