Question

PLEASE HELP!!
Im stuck!

Answer 1

I think daughters would be a quarter, or half the parent

Answer 2

can you explain to me how to get the daughter??

Answer 3

The daughter isotopes are what you get after the parent isotope has decayed. That means however much parent decays is however much daughter you have.

At the beginning, you have 100% parent isotope. That means you have 0% daughter isotope.

After 1 half-life, 50% of the parent isotope remains, while the other 50% has become daughter isotopes.

After another half-life (bringing the total to 2), half the remaining parent isotope decays - that's half the 50% from before, so now you only have 25% parent isotope. The half that decayed - the other 25% - becomes daughter isotope, so now 75% of the sample is daughter isotope.

And so on...

Does that make sense?

Answer 4

yes..but how do you get the fraction of daughter??

Answer 5

@matt101

Answer 6

Just convert the percent to a fraction.

If you have 50% parent and 50% daughter, ½ your sample is parent and ½ your sample is daughter.

If you have 25% parent and 75% daughter, ¼ of your sample is parent and ¾ of your sample is daughter.

Etc...