SOLUTION: A research person made 160 mg of radioactive sodium and found that there was only 20 mg left 45 hours later. what is the half life of radioactive sodium?
Algebra ->
Exponential-and-logarithmic-functions
-> SOLUTION: A research person made 160 mg of radioactive sodium and found that there was only 20 mg left 45 hours later. what is the half life of radioactive sodium?
Log On
Question 1187528: A research person made 160 mg of radioactive sodium and found that there was only 20 mg left 45 hours later. what is the half life of radioactive sodium? Answer by ikleyn(52798) (Show Source):
You can put this solution on YOUR website! .
A research person made 160 mg of radioactive sodium and found that there was only 20 mg left 45 hours later. what is the half life of radioactive sodium?
~~~~~~~~~~~~~~~~
Notice that 20 mg = mg, and = .
It means that 45 hours comprise of 3 half-life periods.
So, one half-life period is one third of 45 hours, i.e. 15 hours.
ANSWER. Half-life is 15 hours.
