SOLUTION: The half-life of radioactive radium (226 Ra) is approximately 1620 years. How much of a 10gram sample will remain after 1000 years?

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: The half-life of radioactive radium (226 Ra) is approximately 1620 years. How much of a 10gram sample will remain after 1000 years?       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 817371: The half-life of radioactive radium (226 Ra) is approximately 1620 years. How much of a 10gram sample will remain after 1000 years?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

The half-life of radioactive radium (226 Ra) is approximately 1620 years. Q%28t%29+=+Q%5B0%5De%5E%28-kt%29

.5  = +e%5E%28-1620k+%29 ,  ln+%28.5%29%2F+-1620 = k,  k = .00043 

How much of a 10 gram sample will remain after 1000 years?

 Q%28t%29+=+10e%5E%28-.00043%2A1000%29