Question

The half life of radium-226 is 1600 years. suppose we have a 22-mg sample. how much of the sample will remain after 4000 years?

Answer 1

half-life equation :]

Answer 2

which is?

Answer 3

N(t)=N0 (1/2)^ t/halflifetime

Answer 4

Here t is the time N0 is the inital amount. N(t) is the amount after 4000 years

Answer 5

N(t) = 22mg*(1/2)^(4000/1600)

Answer 6

Step 1. 22mg* 0.176776695
Step 2. N(t) = 22mg* 0.176776695
Step 3. N(t) = 3.88908729 mg

Answer 7

Thanks and a medal would be appreciated :]

Answer 8

sure i will give you one. can you help me with another problem ?

Answer 9

sure