SOLUTION: the half-life of Radium-226 is 1590 years. If a sample contains 400mg, how many mg will remain after 3000 {{{highlight(years)}}} ?

Question 1160661: the half-life of Radium-226 is 1590 years. If a sample contains 400mg, how many mg will remain after 3000 ?

Answer by ikleyn(52794) (Show Source): You can put this solution on YOUR website!
.


The remaining mass of Radium-226 after 3000 years will be


    M =  grams = 108.163 grams.

Solved, answered and completed.

Notice that the ratio    = 1.886792   is the number of half-life periods in 3000 years.

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On radioactive decay, see the lessons
    - Radioactive decay problems
    - Carbon dating problems
in this site.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Logarithms".

Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.

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