[laxplayer]

The half-life for the process 238U  206Pb is 4.5 multiplied by 109 yr. A mineral sample contains 48.0 mg of 238U and 16.2 mg of 206Pb. What is the age of the mineral?


can anybody help me with this question?

[cliverlong]

The half-life for the process 238U  206Pb is 4.5 multiplied by 109 yr.

I don't know what you mean by

half-life . is 4.5 multiplied by 109 yr

Why is it stated that way? Can you check the question?

A mineral sample contains 48.0 mg of 238U and 16.2 mg of 206Pb. What is the age of the mineral?

can anybody help me with this question?

Things to check / find out

1. What is half-life and (hint) what is the form of the exponential decay formula that includes this half-life?
1. How does 238U decay to 206Pb? What are the mass changes as a result of this decay?
2. (Hint) assume started with pure 238U in your sample then apply answers from 1. and 2.

Clive