The percentage of the original nuclei of the sample of a radioactive substance left after 5 half - lives is
a
8%
b
5%
c
3%
d
1%
Explanation
Correct Option
cVideo Explanation
No video available
Post your Contribution
Share:
Discussions (11)
micchannn
2 months ago
Hello (• ▽ •;), Just use this formula! → N/N⁰ = (1/2)^n
Where N is the amount of the radioactive substance left after decay
N⁰ is the original amount of the radioactive substance
n is the number of half lives
N/N⁰ = (1/2)^5
= 1/32
To convert to percentage, multiply by 100
which would give you an approximate result of 3%
