iodine 131 has a half life of 8 days what fraction of an original sample will remain at the end of the day of 32 days

Question

Need to showork work

Answer 1

If the half life is 8 days and we go 32 days we need to find out how

many times 8 goes into 32 to see how many times the sample was

halved.  32/8 = 4

The sample has been halved 4 times.

 

S(1/2)⁴ = S(1/16)

 

There is 1/16 of the original sample remaining.

 

You can also set up a table.

 

# days     fraction remaining

    8                 1/2

   16                1/4

   24                1/8

   32                1/16