The Student Room Group

radioactivity , help!

ddddd.pngi can't do part b)i)

I have got the answers to all the previous questions though. a) 4.8 x 10^-18 b)4.3x10^9 years iii) radioactive decay is a random process.

but I cannot get the last part! any ideas? thanks :smile:
If you know the half life you know how long it takes for half the uranium to decay.
After one more half life, half of that will decay leaving a quarter of the original.
How much is left after yet one more half life?
How many half lives was that?
How long is that?

Quick Reply

Latest