6. If 50% of a radioactive element remains after 5,000 years, what is its half-life?

Question

6.	If 50% of a radioactive element remains after 5,000 years, what is its half-life?

anonymous · Answer

I really don't even understsand this at all.

anonymous · Answer

56

anonymous · Answer

@plm  how did you get this?

sleepyjess · Answer

@plm Please do not give out direct answers.

anonymous · Answer

t1/2 = t * ln(2)/ln(N0/Nt)
N0 = initial substance ;
Nt = substance after (t) time
t= time that passed

anonymous · Answer

t1/2 is the half time;

anonymous · Answer

the half time is 5000 years , Because you save after 5000 years 50% remains wich mean that 5000 years is the half time ?  (I'm Not SURE)
@goldennnn

mathmate · Answer

@borak @goldennnn Hint: "The radioactive half-life for a given radioisotope is the time for half the radioactive nuclei in any sample to undergo radioactive decay." from: http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/halfli.html

anonymous · Answer

i just seen this @borak @mathmate thank you both

mathmate · Answer

You're welcome!  :)