Question

If we start with 1.000 g of strontium-90,0.908 g will remain after 4.00yr.This means that the x of strontium -90 is --------------------------yr.

Answer 1

Here, x is the half life of Strontium-90 = 28.73 years

Initial amount of Strontium 90 I gm. Amount uema'wig afles A years = 0.908 gm. To find decay constant , Mke mass at time to un (mt) --ktm = 0.90@gm Mo= mass initially info.908 1. - kx4 1 gm. t = 4 yeaus k= 0.02412 yê! - To calculate hay lifest1127 0.693 - 0.693 0.02412 - 28.73 years Hay life .. 2,873 years.. k