The age of a rock can be estimated by measuring the amount of 40Ar trapped inside. The calculation is based on the fact that 40K decays to 40Ar by a first-order process. It also assumes that none of the 40Ar produced by the reaction has escaped from the rock since it was formed.
40K + e- -> 40Ar k = 5.81 X 10^-11 year^-1
Calculate the half-life of the radioactive decay.
2 answers
k=0.693/t(1/2). Solve for t(1/2)
What order do you think this is?
From there use that information and find the half life equation.
Then just plug it in to get the answer
Hope that helps!
From there use that information and find the half life equation.
Then just plug it in to get the answer
Hope that helps!
15 answers