**The Half Life Of Strontium 90 Is 28 Years**. 28 years is 8.83 e8 seconds. The radioactive decay in the strontium is so active it can turn into nuclear fusion.

Y(t) = (b) find the mass (in mg) remaining after 25 days. 28 years + 28years = 56 years In order to find how many years sample will take care to that, they do believe not off most.

### If Another 28.8 Years Go By, 2.5 Grams Will Remain.

28 years + 28years = 56 years So 1 gm has 1/90 (6.022 e23), 6.7 e21 atoms. If we begin with 20 g of.

### How Much Of The Sample Will Remain After 80 Years?

The 1/2 life of strontium 90 is 28.8 years. If you start with 10 grams of 90sr and wait 28.8 years, you'll have 5 grams left of 90sr. Find a function that models the mass m (t) remaining after t years.

### One Gram Of Pure 90 Strontium Has A Radioactivity Of 5.11 Tbq.

The half life is 28 years. How long will it take the sample to decay to a mass of 20 mg? Suppose we have an 80 mg sample.

### What Is The Disintegration Rate Of 15 Mg Of This Isotope?

Activity is the number of atoms times the decay constant. What is the disintegration rate of 15 mg of this isotope? (round your answer to the nearest whole number.)

### 28 Years Is 8.83 E8 Seconds.

Y(t) = (b) find the mass (in mg) remaining after 25 days. Find that value off and want it about this function ist i'm off equals 15 into two minus d by 48. It means that there are 5 half lives in 20 minutes.