A sample of rock is found to contain 100 grams of a parent isotope. How many grams of the parent isotope will remain after one half-life?

Question

tyteen4a03 · Answer

Might want to try the Chemistry section next time. :)

Hint: 1 half-life, and the amount of that specific element is decreased by half.

e.mccormick · Answer

What is the half life of a question posted in the wrong section?  =)

p0sitr0n · Answer

decay function, 100g * e^-rt, r is the rate of decay or ln2/half-life. after one half life, there will remain 50g of the first sample, 50% by mass