Top Posters
Since Sunday
w
5
a
3
j
2
a
2
t
2
u
2
r
2
j
2
j
2
l
2
d
2
y
2
Home Q & A Board Science-Related Homework Help Physics Astronomy
New Topic  
adreamer adreamer
wrote...
Go to Answer
Posts: 891
Rep: 0 0
7 years ago
If originally there were X atoms of radioactive isotope present and now there are only X/8 atoms, how many half-lives have elapsed?
A) 3
B) 1
C) 4
D) 2
Textbook 
Life in the Universe

Life in the Universe


Edition: 4th
Authors:
Read 91 times
1 Reply
Replies
Answer verified by a subject expert
19Clyde19Clyde
wrote...
#1
Top Poster
Posts: 584
Rep: 11 0
7 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

adreamer Author
wrote...

7 years ago
Thanks
halyna
wrote...

Yesterday
Thanks
Jadakiss
wrote...

2 hours ago
This calls for a celebration Person Raising Both Hands in Celebration
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1788 People Browsing
 181 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 256
  
 446
  
 321
Your Opinion
Which 'study break' activity do you find most distracting?
Votes: 824
Previous poll results: Do you believe in global warming?