A sample of Bismuth-210 decayed to 33% of its original mass after 8 days
a) Find the half-life of this element

i formed the equation 0.33=1(1/2)^8/n
i then used the log method to solve for n and got n=5.0017 as the half-life

i don't have the answer key so can someone do this question and tell me if you got the same answer? thanks!

Question

A sample of Bismuth-210 decayed to 33% of its original mass after 8 days 
a) Find the half-life of this element

i formed the equation 0.33=1(1/2)^8/n
i then used the log method to solve for n and got n=5.0017 as the half-life 

i don't have the answer key so can someone do this question and tell me if you got the same answer? thanks!

anonymous · Answer

You are correct, 5.0017 days.

anonymous · Answer

Yep, your equation and result are correct!

anonymous · Answer

Any questions?

anonymous · Answer

I'm good, thanks for your help :)