Explanation:
What did you not understand man?
The half life of 131 i is 8.06 days
calculation
by use of concentration time equation for radioactive decay
In Nt/No = -Kt
where Nt/No is the fraction of the sample remaining at time T
convert 50.2% in decimal = 50.2/100 = 0.502
therefore = In 0.502 = - K 8.0 t
- 0.689 =-8.0 k
divide both side by 8.0
K = 0.860
t1/2 = 0.693/K
t1/2 = 0.693/0.860 = 8.06 days
Answer:
As a pyramid gets taller, it gets smaller. In the Linnaean classification system, this happens as well, with each category growing smaller.
Explanation:
I believe the answer is reversible
