If the decay constant for radioactive decay of ^40 K is λ = 5.543*10^(-10) / year, use this equation to calculate ages of the samples in the following table:
t(1/2) = 0.693/λ
1)What is the half life of 40K?
table
-----Np --- Nd---- Nd/Np
A)6439-----2303---0.358
B)4395-----1303---0.300
C)8763-----1893---0.216
2)what are the half live elapsed and age in years for each sample?
1 answer