Question

A- Circle the transuranium elements below: Sg Pu Pm Dy B-A sample contains 4.81 mg 206Pb...

A- Circle the transuranium elements below:

Sg Pu Pm Dy

B-A sample contains 4.81 mg 206Pb and 991 mg 238U. What is the age of the sample in years given k = 1.5510-10/year?

t = ________________________ years

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Answer #1

Pu is transuranium element

B.

       K   = 2.303/t log[A0]/[A]

      1.55*10^-10 = 2.303/t log991/4.81

       1.55*10^-10   = 2.303*2.3139/t

         t                    = 2.303*2.3139/1.55*10^-10   = 3.4*10^10 years

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