The half-life of radium-226 is 1590 years. if a sample contains 100 mg, how many mg will remain after 3000 years?

Hello!

The half-life is the time of half-disintegration, it is the time in which half of the atoms of an isotope disintegrate.

We have the following data:

mo (initial mass) = 100 mg

m (final mass after time T) = ? (in mg)

x (number of periods elapsed) = ?

P (Half-life) = 1590 years

T (Elapsed time for sample reduction) = 3000 years

Let's find the number of periods elapsed (x), let us see:

Now, let's find the final mass (m) of this isotope after the elapsed time, let's see:

I Hope this helps, greetings ... DexteR! =)

the right answer is c i just did the question.