× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
sary sary
wrote...
Posts: 6
Rep: 0 0
9 years ago
If the half-life of a radioactive isotope is 3 million years what percent of the isotope is left after 9 million years.
Read 1503 times
1 Reply

Related Topics

Replies
wrote...
9 years ago
There will be 1/8th or 12.5% of the isotope left after 9 million years because that is enough time for 3 half lives. (1/2)*(1/2)*(1/2)=1/8=12.5%.
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  850 People Browsing
 107 Signed Up Today
Related Images
  
 733
  
 1491
  
 1153
Your Opinion
Which of the following is the best resource to supplement your studies:
Votes: 249